Warning: Triggers and Spoilers.  And waffle.
Sex & Monsters
In 
Prometheus, the Engineers are ancient Titans who created 
humanity... and, it is implied, seeded the galaxy with their DNA.  There
 is something very noticeable about them: they are all men. Meanwhile,  
there is a definite vaginal look to a great many of the alien  
bio-weapons they created and which then subsumed them.  However, I don't
  think its really possible to read the battle between Engineers and  
their bio-weapons as a battle of the sexes.  The weapon creatures are  
also phallic and penetrative, as in previous iterations of the 
Alien
  universe.  All the same, it's true that presenting the creators of 
life  (in their own image) as exclusively dudes does imply that 
generative  power resides in the male alone.  It is enough for one 
Engineer to  dissolve his DNA into the waters of a planet to kickstart 
the process  that will lead to animal life (if that's how the opening 
scene is meant  to be read).  The  Engineers are male but apparently 
sexless, capable of asexual  reproduction.  The deadly runaway 
bio-weapons, which seem  hermaphroditic, look like the intrusion of sex 
into a male but sexless  world.  Sex is thus a terrifying eruption that 
destabilises a male  utopia.  The sexual nature of the weapons suggests 
that the Engineers -  we might even be tempted to facetiously 
re-christen them the  'Mengineers' - find sexual reproduction to be 
inherently threatening.   They set about devising weapons of mass 
destruction and what do they  come up with?  Biological goo that sets 
off a chain reaction of tentacle  rape, fanged vaginas and violent 
monster pregnancy.
Foz Meadows at her blog 
Shattersnipe (which I heard about from Jon Blum) has made some apt 
observations
  about the film's dubious concentration upon highly impractical female 
 underwear, grueling 'ladypain' and forced impregnation.  She goes on to
  say:
Insofar  as the alien attacks go, I’ll give Scott some 
credit for trope  subversion: twice in the course of the film, male 
characters are  violently orally penetrated – and, in the process, 
killed – by phallic  alien tentacles. This is visually disturbing on a 
number of levels, but  given the near universal establishment of 
tentacle rape as a thing that  happens to women, I’m going to give him a
 big thumbs up for bucking the  trend. That being said, what happens to 
Shaw is awful on just about  every level imaginable. 
And so it is. 
One of the interesting things about the original 
Alien  is that 
it is a man - Kane (John Hurt) - who is the victim of the  facehugger 
rape and the violent birth of the phallic infant Alien.  So,  although 
the alien pregnancy also suggests infection, cancer,  parasitism and 
other horrors attendant on life, there is clearly a way  in which the 
original Alien is a personification of sexual violence.   This violence 
is directed at both sexes and emerges through the  violation of a man 
and a subsequent male pregnancy... however, the  creature itself is also
 intensely male.  It  has that famously phallic head and yet another 
phallic symbol springs  out of its mouth, this one complete with a 
snapping set of teeth.  Even  its tail is like a barbed cock which 
gropes Lambert (Veronica Cartwright) before  killing her.  Later on, 
when Ripley (Sigourney Weaver) is menaced by  the creature in the escape
 shuttle, she has stripped to her underwear.   This scene is the film at
  its most sexploitative.  In many ways, it's a textbook example of  
lingering over needlessly-exposed female flesh.  But even in this scene 
 it seems that a trap is being set: encouraging those who are so 
inclined  to leer... before showing them their own reflection in the 
creature  when it reappears, languid, slowly playing with its phallic 
inner jaw,  dripping drool/jizz, forcing Ripley to run and hide like 
someone stalked  by a rapist.
As a man, I want to be very careful about declaring that 
Alien  
is or is not dodgy in its depiction of sexualised violence against  
women.  If it is, then I also think there is a distinct ambiguity about 
 it.  The sexualised, phallic vileness of the Alien itself seems to have
 been the intention all along.  If  the film wallows in the sight of a 
half-naked woman threatened by a  monster that is, essentially, an evil 
penis with teeth, then it also  seems aware of the queasiness of what it
 is doing.  The very obscenity  of the Alien suggests an awareness of 
the obscenity of sexual  violence... beyond what is arguably the film's 
more general concern  about the horror of physicality itself, with all 
its attendant  violation, infection, pain and predation.
There is something of the same horror of sex in 
Prometheus.  
Fertility  seems to be the terrible mistake that the Mengineers made, 
the mistake  they wish to erase. They made the infertile fertile (their 
weapon  specifically does this to Shaw) and set in motion the end of 
their  outpost world.  But note how the 'fertility nuke' the Mengineers 
 developed actually works.  With men, it gets in through the mouth.  The
  Generic Asshole Biologist with Glasses gets done in by a kind of phallic  worm
 with a cobra hood which penetrates his suit and then dives into  his 
mouth.  Holloway inadvertently drinks some of the goo and begins to  
turn into a kind of rampaging mutant (we see the final stage later when 
 Fifield turns up again).  Shaw, however, is impregnated in the regular 
 way.  She is impregnated via sex - with her husband, no less!  That 
this  is a kind of rape-by-proxy committed by David (who spikes 
Holloway's  drink with some of the black goo) doesn't change the point. 
 The  creature inside Shaw gestates in what looks like a placental sac, 
 complete with a umbilical cord.  I'm not sure if we're meant to think  
the squid thing was going to exit Shaw violently via the belly... but,  
the undulations of the entity beneath her skin notwithstanding, there's 
 actually no reason to think it wasn't going to be born via the vagina. 
  So, the Mengineers' weaponized sex gets into the man via an orifice  
that does not play a specific biological role in sexual reproduction and
  turns him into a beast.  It enters the woman via sex itself, gestates 
 like a baby in the uterus and may even be born vaginally rather than  
bursting out.  I'm almost  fearful to think how this system is supposed 
to work.  Once the infected  male has become a mad monster, does he go 
on a rape rampage?  If so,  I'm glad it's left undepicted and 
undescribed.  In  any case, it looks uncomfortably as though the 
Mengineers specifically  decided to use the female as a vector in the 
progress of their  bio-weapons. They chose to use female fertility as a 
part of their  attack.  Sex is the weapon; the female is the delivery 
system.
Race & Monsters
The other thing about the intense  un-sexual maleness of the Engineers 
is that it seems to suggest a  monastic warrior brotherhood with fascist
 overtones.
|  | 
| Image / Reality. | 
The  Engineers look like the camp, macho, pseudo-expressionistic and/or 
 neoclassical fascist statues which decorated Hitler's Germany and  
Mussolini's Italy.  They are utterly white, with blank eyes, as though  
made of marble.  They represent a kind of aggressively male, body  
fascist ideal, with all their bulging muscles and rippling pectorals.  
Neoclassicism,  as it was co-opted by fascism, reproduced the physiques 
of  Michaelangelo's David and Adam as an actual physical ideal rather 
than  as an emblem of human beauty, uniqueness and capability.  Humanism
  became the worship of the allegedly biologically 'perfect', embodied 
in  fascist ideology by the white, male, sexless warrior.
The Engineers tie into this in  another way.  They are like the giants 
of Norse myth as it was recycled  by Wagner and then by later 
anti-Semites.  There is something of Nazi  mysticism about the story of 
the Engineers.  They are the perfect giants  from before history who 
supposedly founded all the life and culture of  the human age, their 
chosen people being, of course, the Aryans.   Vickers is a blonde ice 
maiden, which either implies the Aryan  credentials of the Weyland 
family (if she is Weyland's biological  daughter) or his fetish for the 
Aryan type as representing perfection  (if she is an android of his 
design).  David (interesting choice of name  there) is also an image of 
superhuman white European 'perfection'.  He dyes  his hair blonde to seem 
even more Aryan and models himself on Peter  O'Toole's portrayal of T.E.
 Lawrence in 
Lawrence of Arabia,  a chiseled white European hero who 
is presented as overcoming pain and  taking upon himself leadership of 
the Arabs.  (Incidentally, this  paradigm - whitey becomes the leader of
 the natives - recurs in popular  SF.  Think Paul Atreides in 
Dune, or Jake Sully in 
Avatar.)
There is yet another element of the film that ties in with this.  The concentration on language.  David studies ancient human languages, explicitly including 'Indo-European'.  His fez-wearing, English-accented holographic teacher says "...whilst this manner of articulation is attested in the Indo-European descendants as a purely paralinguistic form, it is phonemic in the ancestral form dating back 5 millenia or more....".  I'm not knowledgeable enough to know if this means anything, but it still specifically mentions Indo-European.  It is also possible that Sanskrit is explicitly mentioned or alluded to in the film.  There is some disagreement (
here, for instance) most of which is well above my head.  But, in any case, David is studying Indo-European languages in an attempt to find some kind of 'root' language which will enable him to communicate with the Engineers, if they do indeed prove to be the  
progenitors of humanity.  The implication is that the Engineers - our  
ancient creators or ancestors - will have bestowed language upon us.   
Our languages will be descended from them, just as we are... therefore, 
 the further back into language David can go, the better his chance of  
finding some way of comprehending the language of the Engineers.  And it
  works.
This is a reiteration of as aspect of the imperial ideology of Aryanism.  To quote Richard Seymour in 
The Liberal Defence of Murder:
The  Aryan idea has its origins in the heart of the British
 Empire.  It was a  result of the Company's growing control over 
revenue-collecting and the  need to develop an understanding of the 
texts and languages of the  colonized.  Not merely a suppuration of 
imperialism, it became an  important fact about the way the empire was 
organized, and eventually it  was offered as the reason why the empire 
had come about.  Essentially,  it posited an Indo-European race based 
upon certain philological  affinities between Sanskrit and the Greek and
 Latin languages.  The  thesis was that the world's populations could be
 divided into 'races'  descended from Biblical figures - Aryan, Semitic 
and Tartar.  The Aryan  race had, it was maintained, invaded and 
inhabited India during the  Vedic 'golden age' and formed a precocious 
civilization.  The post-Vedic  age in India had been a sustained period 
of degeneration: by contrast,  the Aryans of Europe were in rude health.
  These categories not only  provided an argument for empire; they also 
helped to cement British  power with the caste system.
(Seymour's notes refer to a book called 
Orientalism and Race
  by Tony Ballantyne, which looks both illuminating and dauntingly  
scholarly.)  Note, by the way, how Seymour refers to the East India  
Company as "the Company".
The concept of Aryanism later  found its way into German Romantic 
occultism and, from thence, into  Nazism.  The whole idea of an Aryan 
'master race' responsible for the  primordial foundation of Western 
civilization - and just about all  subsequent Western cultural 
achievement - is bound up with the theory  that the European languages 
can be traced back, via commonalities with  Sanskrit, etc., to a root 
language: Proto-Indo-European.  The subsequent  supposed 'degeneration' 
of the East as the West thrived was put down to  several possible 
influences.  In the 18th and 19th centuries,  especially after upsurges 
of rebellion, the intellectuals of the British  imperium (including the 
liberals, by the way) put it down to the malign  influence of Islam, and
 this notion is a direct ancestor of modern  liberal Islamophobia.  In 
the even more delusional line of descent which  culminated in Nazism, 
biological notions of Teutonic superiority came  to the fore.  The 
biological and culturalist variants of racism have  never been as 
separate as some claim.  And both are aspects of  imperialist ideology.
Tropes & Implications
Now,  this is really as old as the hills.  In many respects, it is a 
slightly  more elaborate version of the von Danikenism that has infected
 so much  SF.  There is a kind of Eurocentric paternal condescension 
built into  von Danikenism.  Ancient peoples, particularly in the Middle
 East,  Africa and South America, are assumed to have been incapable of 
creating  their own cultures and languages.  This trope has been widely 
used in  SF.  In 
Doctor Who alone, it has appeared in 'Death to the Daleks', 'Pyramids of Mars', etc.
But it goes further.  In 
Prometheus,  the Engineers created all 
humanity and all human language from their  own selves.  This 'strong 
version' too has been utilised before, though  possibly never quite so 
explicitly.  In 
Quatermass and the Pit,  we humans have race wars
 because we are the genetically engineered  creatures of Martian insects
 who went in for ethnic cleansing.... but we  don't speak a language 
descended from theirs, at least not explicitly.
In 
Prometheus  it is not just ancient cultures that owe their 
technology, design  sense, religion and language to aliens, it is all 
humanity - possibly  all life in the galaxy.  Taken literally, this 
obviates humanity's claim  to have made its own history.  The various 
revolutions of history -  argicultural, urban, industrial - are simply 
developments towards  greater and greater convergence with the culture 
of the creators.  High  technology becomes a telos, preset in our 
chromosomes.  The impetus is  the pattern within humanity that matches 
the Engineers.  Human  biological origins lead to human historical 
development from cave  dwelling to space ships.  Our Engineer DNA leads 
us to develop 
their  language and their technology.  The 
information in our genes makes us  create the corresponding information 
in our culture.  This is a kind of  biological determinism (rampant in 
SF) that, through the issues  mentioned above, ties the film to a view 
of human history which stems  from the primal influence of godly 
progenitors who seem associated with  patriarchy, imperialism and 
Aryanism.  (By the way, it also explains the  film's obsession with 
information.  The star charts; the DNA sequences;  the concentration on 
language and hieroglyphs; the way the two ships  both project massive 
holographic displays that map out space, geography,  cartography and 
architecture.  The film depicts a stream of information  flowing from 
the Engineers' genes all the way up to the humans' maps.)
To an extent then, 
Prometheus  adapts an ideologically 
imperialist, patriarchal, sexist and racialist  view of of human history
 and presents this as a truth.  The truth  underlying human biology and 
also, in a deterministic way, the history  of human civilisation, is 
that all our information stems from a kind of  Aryan master race who 
also speak Proto-Indo-European, represent camply  fascistic ideas of 
physical perfection, seem like a monkish warrior  brotherhood and look 
like an all-male group mortally threatened by any  other gender but 
prepared to use rape as a weapon delivery system.
Yet it's hard to say that this  makes the import of the text 
reactionary in a straightforward way.   After all, the character of the 
Engineers seems to be genocidal,  ruthless, cruel, sterile, entropic, 
capricious.... and they are also  defeated by their own creations.  
Moreover, their ship is brought down  by a black man and their last 
survivor (at least on their weapons  planet) is outwitted by a woman.  
It doesn't look as though the film is  asking us to worship them or 
admire them.  And the film definitely  expects us to be pleased when 
their plans are thwarted by those more  sexually and racially diverse.  
(On a basic level, it's just nice to see  a genre action movie where the
 black supporting character doesn't die  in the second act.)
The Engineers are like the Eurocentric, patriarchal, white, imperial 'origin story' made flesh.  They are the
 idea of the 
herrenvolk,
  literalised so that it may be rejected.  Weyland's dying words imply  
that, as gods, they fall short.  They have no answers, no meaning.   
Indeed, they seem to seek the eradication of meaning.  They conceive of 
 information - whether it be sexual reproduction or the mechanics of  
travel - as ways of erasure.  They are an idea that seems inimical to  
other meanings.  This inimical idea is then negated by the return of the
  meaning it tried to revoke and erase.  This happens to them, so to  
speak, twice.  They wish to eradicate the first meanings they created - 
 life/civilisation on Earth and perhaps elsewhere - by creating new,  
deadly meaning in the form of weaponized sex... but this new meaning  
again turns upon them.  (They are, by the way, quite reminiscent of  
Light - the white, male, authoritarian scientist/angel that wishes to 
eradicate meaning when it cannot be controlled and classified - in the 
Doctor Who story 'Ghost Light'.)
If the Engineers are white, male,  imperial gods - and redolent of 
fascism, which is the ultimate  syncresis of all these reactionary power
 principles - then it must be  said that they hardly reflect well upon 
these principles.  They are  exterminators, stockpilers of biological 
weapons, purgers of meaning and information when it fails to meet their 
inscrutable and vindictive standards, etc.
Gardeners & Engineers
 In 
Prometheus, just as in  Christian mythology, we are banished 
by our creators to wander alone,  even as everything that we are comes 
from them/Him.  But 
Prometheus  not only reiterates this 
mythology, it also does that other  quintessential job of SF: it ponders
 the autonomous (alienated and  fetishized) product.
It's no shock that SF continually tells stories which reiterate 
Genesis while also thinking about the alienation of humanity from the produce of their labour.  
Genesis is about the alienation of humanity from nature brought by the rise of agriculture, surplus and class.  SF reiterates 
Genesis
  because it is the modern cultural genre that most directly addresses  
the unprecedented alienation brought by capitalism, modernity, industry 
 and technology.  
Genesis is about the relationship between  
humanity and nature, altered by tools.  SF is about the constantly  
changing and decaying and threatening relationship between humanity and 
 the tools themselves as they careen out of our control.
Genesis is, as noted, hardly the first myth to tread this path.  
Prometheus  brought fire to humanity.  Fire is knowledge.  Science.  
Technology.   It is the first discovery, the first tool, the first 
weapon, the first  product.  In so doing, Prometheus dared to suggest 
not only that  humanity should have knowledge, but also that humanity 
should have the  ability to create.  More than it destroys, fire 
transforms.  It is the basis of chemistry.  It reveals that matter may 
change its state, be split in various different states, when altered 
deliberately by humanity.
Prometheus is far from the first SF story to reiterate these matters.  It treads directly in the footsteps of 
Frankenstein.
  Victor  Frankenstein was the 'modern Prometheus' because he revealed 
the next  stage of what may be done with matter by human hands.  
Frankenstein  fails because he does not take social responsibility for 
his creation.   His 'son' is the first product-monster, the first great 
monster in the  history of European culture that is manufactured.  But 
it is only  dangerous because it is abandoned, left without care or 
justice.   Frankenstein's monster is the foundation of SF, which is 
obsessed with  the autonomous product that threatens its creator, the 
manufactured  monster.  It is terrifying because it is, ultimately, our 
responsibility  and our punishment.  
We  humans auto-generate.  God is our attempt to infer a 'first cause' 
in  this chain of auto-generation and to spiritually imbue it.  
Modernity is  the rising of the productive forces to an unprecedented 
level, in which  we may produce things of unprecedented power at 
unprecedented speed and  in unprecedented numbers.  
Frankenstein the book appears at the interface of
i) our awareness of ourselves as biologically generated entities,
ii) our idea of ourselves as the creations of God, and
iii) our dawning realisation that  modernity - industry, science, 
technology - allows us to create things  more powerful than us, i.e. 
things more powerful than our bodies or even  our gods (which are 
themselves our creations, after all).
Personally, we all encounter the  book at this interface.  This is 
because the book was written at the  moment when European civilisation 
reached such an interface in history.
Humanity has always been  quintessentially productive.  The ability of 
our front two feet to leave  the ground and become organs of 
manipulation is what drove the rise of  the human brain.  Humans are, 
above all else, the animal that makes  tools.  Capitalist modernity thus
 deeply effects our view of ourselves  because it revolutionizes the way
 we produce.  The products of modernity  are - simply by virtue of their
 greater numbers, power and speed, if  nothing else - more fetishized, 
more alive, more able to dominate us and  run out of our control.  They 
are more able, at least potentially, to  mesh with our biology.  Mary 
Shelley saw this potential meshing in the  electrode that made the dead 
convict twitch and clench his fist.  It is  also implicit in the machine
 that steals labour, or which sucks the  labourer into its embrace, 
needing to be set in motion by the workers  and expressing this by 
encircling and towering over them.  Today, the  intrusion into biology 
becomes ever more clear.  We now have cameras  that can relay images 
directly to the brain, cloned creatures, and other  wetware.  And there 
are now more ways than ever in which the worker is  towered-over and 
encircled by the hardware and the software.
Since 
Frankenstein, SF has  harped on these issues.  SF is a 
litany of robots, androids, gynoids,  computer sentiences, of thinking 
weapons, of tools that rebel, or  scientific experiments that lash back 
upon the experimenter.  Within the  settings of 'space' or 'the future' -
 which represent the dizzying  possibilities of modernity, technology 
and science - the human as a  producer of marvels is also a producer of 
nightmares than cannot be  controlled.  The line between the producer 
and the artifact is always  being attacked, if only by some new 
technical innovation.  This is the  real reason why the robots attack 
us.  This is why so many of the  artifacts claim parity with humanity 
and demand this parity be  accepted... and we're lucky if parity is all 
they want.  Also, in SF  humans seem to seek unity and merging with the 
machine, with its  uncontrollable power.  The machine seems alive; the 
living thing tends  towards the mechanical.  The boundry line between 
the territories is  heavily disputed.  Like any such border, there are 
wars over it.
Beyond its Freudian dimensions, 
Alien ponders these issues covertly.  Its ancient spacefaring aliens (the ones that created the derelict ship) seem inextricably both biology and technology, their pilot looking like an extrusion of beast and engine that has grown within a ship of bones and bulges and arterial corridors and vast hot stomachs in which parasites have laid their eggs.  The thing that is born from Kane's chest is a thing of tendons and pulleys, veins and cables, phallic symbols and skin criss-crossed with what look like the outlines of circuits.  What people often forget is that the 'Xenomorphs' live up to their assigned name.  Their shape morphs to resemble the 'other' in which they grow.  The Alien in the first film has taken on the bio-mechanical nature of the pilot on the crashed ship, and it has also taken on the humanoid size and shape of Kane.  The machine has penetrated the DNA and is now biologically heritable as a trait.  The 'Xenomorph' is the terrifying vehicle/product of this penetration.  And don't forget Ash, with his android-madness apparently triggered by resentment and frustrated sexual hatred, his injuries dripping hydraulic fluid that looks like milk or semen, his synthetic innards looking like white and blue plastic intestines.
Prometheus ponders the same issues overtly.  Just as Frankenstein displaced God by doing what God does, so the Engineers displace God by being what He is supposed to be.  But they also displace Darwinism, at least in the opinion of the biologist.  And they displace Frankenstein again because, by having created us artificially, they trivialize the achievement of Weyland in having made David.  They even displace Tyrell in 
Blade Runner and the crisis of simulation that his simulacra have triggered.  The simulacrum becomes nothing of the kind when the creator of the simulacra proves to be as engineered a thing as his simulation.  Deckard may have had ambiguous dreams about unicorns but Weyland 
knows, unambiguously, that he is as much a manufactured entity as David.  This state of having been manufactured is his new normality.  In this state of affairs, who cares that the simulacrum is indistinguishable?  The internal distinction that makes this collapse of distinctions significant has been neutralised.  Just as Natural Selection is overthrown by the revelation that all life is a product of technological engineering, so is Artificial Creation.  You can engineer life at all levels.  Creation dissipates.  The Engineers have manufactured micro-organisms and macro-organisms.  Microbes in the goo, all the way up to giant squids.  They have manufactured not only life but life-cycles. 
Of course, these biological manufactoids get 'out of control'.  Creations always do in these tales.  That story goes back to 
Genesis and before.  Long before.  As noted, SF has continually retold these ancient stories as a way of grappling with the modern era of technological mass-production.  In 
Frankenstein, the process turns runaway because it is abandoned.  In 
The Island of Dr Moreau, the process turns runaway even though, possibly even 
because, it has 
not been abandoned.  As China Mieville puts it, 
Frankenstein says that we are failing the Enlightenment and 
Moreau says that the Enlightenment has failed. 
The project of modernity is unstable, uncontrollable, dangerous because even the best efforts to control it founder on the autonomy of the product.  What we might, in political terms, characterise as Mary Shelley's 'reformist' project - drawn from her situation amidst Wollstonecraft (her dead mother, present in her life as stories and texts), Godwin (her father) and Percy Shelley (her husband) - is to nuture and care for the product so that it becomes socially responsible, an agent of justice rather than one of horror.  
Frankenstein is her prescient caution of what will ensue if this is not done.  The product will annihilate us.  Mieville says that 
Frankenstein and 
Moreau mark opposite ends of the trajectory of Fabianism, mapped out in advance.  
Moreau is the despairing terminus of Fabianism, written before Wells joined the Fabians.  Wells says (without knowing it) that, contra Shelley, the 'reformist' project to nurture and care for modernity is doomed to failure because the product will not be controlled, even with the best efforts.  The autonomous product - which is what industry and capital and the fetishized commodity look like in SF - is too much for us to control. 
David in 
Prometheus is, yet again, the autonomous product.  At first, he seems tame because of his position.  He's been subject to a stringent attempt to integrate him into Weyland's Western, capitalist, patriarchal hierarchy.  Like Ash and Bishop, David is a white male.  Unlike those untrustworthy agents, he has been fashioned as an heir.  Weyland shows him preference over his daughter (if she 
is a biological daughter).  David is "the closest thing" Weyland has "to a son".  The daughter doesn't count.  It's like Dombey, forgetting Florence and putting "only child" on Paul's tombstone.  But still David moves beyond control.  On the contrary, he is in control of everyone else, all the way through the film.  The story happens because of David's agency and actions.  He is evidently not working for Weyland.  Little he does directly serves Weyland's interests.  When he finally does serve Weyland, he gets the old man killed.  How are we - or anyone - to know what David says to the Engineer before the Engineer kills Weyland with David's severed head?  David is unsurprised by Weyland's dying declaration.  David knew better than to expect answers from a manufacturer-god who has been attacked by his own autonomous product.
Prometheus makes the gods themselves into Engineers.  Their  name
 itself appropriates the tool, manufacture, industry, technology.   It 
makes production into our master.  We become the object of  production 
not the subject.  It expresses alienation.  We do not make  the engines.
 We 
are the engines.  The engines we do make (David)  are 
therefore the products of products, made because we were made to  make 
them.  Our evolution, our social and agricultural history, become  
products of alien engineering, made by us because we are machines  
designed to make them.
When 
we become the autonomous product (as we do in 
Prometheus),
  we become as alienated from our manufacturers as any commodity.  But  
that isn't necessarily bad.  Why should we care that something is 'out  
of control'?  Whose control?  And, as noted, in 
Prometheus our  
alien/ated manufacturers are Eurocentric gods.  They are Aryan gods.   
Fascist myths come alive.  Patriarchs and warrior elites.  It is as  
though the problems identified in 
Frankenstein and 
Dr Moreau have finally been blamed on somebody.  Should 
they be in control?
Is it conceivable - I ask this tentatively - that, in 
Prometheus,
  Hollywood has accidentally created a parable about the need for the  
alienated to revolt against the alien/ating gods of the era of  
technology?  To reject a power that is conceptualised as the ultimate in
  white, male, imperialist, theocracy?  To reject a power that is,  
furthermore, a personification of the alienation of humans from their  
ability to freely produce themselves, their lives, their sexuality,  
their language and their culture?
These are not profundities that  were deliberately crafted into the 
script of this massively expensive  bit of commercial entertainment.  
They are complexities, intimations and  ironies that may be teased out 
of the text and willfully construed  because the text stands as a 
garbled synthesis of many of the tropes of  SF, a genre that has been 
pondering the issues of modernity for so long.
The best way of looking at it is to say that the film 
Prometheus 
 itself is an autonomous product that seems to have partially and  
furtively escaped the control of its reactionary manufacturers. 
But then, don't they all?
EDIT:  In the original version of this article, I wrongly used the term 'Caucasian' as a synonym for 'white' and/or 'European'.  I have amended this.  JG, 4/4/14