Walter revealed as the final antagonist?

I feel that David will use Walter to bridge the gap to biomechanical with his experimental creatures. Another poster found on another threat that on the MeetWalter.com site that Walter's outer shell has regenerative qualities, which would suggest it is at least partially organic , thus allowing him to be a host possibly for a creature ....could be Walter is the hero and he sacrifices himself only to be used in this manner by the evil David.

Grinning & Dropping Linen

"Walter's outer shell has regenerative qualities, which would suggest it is at least partially organic , thus allowing him to be a host possibly for a creature"

Good catch on the regenerative abilities. We should keep in mind though that regeneration doesn't need to be organic healing. This could also be done through nano-machines which, considering the state of that technology today, I'd imagine 80 years from now it is quite possible we will have colonies of nano repair bots that can mend both organic and synthetic materials.

We could end up seeing a marriage of both theories however. We know from the SXSW news that David tells Crudup that he is trying to create the perfect specimen and he only needs one more thing (this just prior to taking Crudup down to the basement for a facehug.)

We see clearly in the trailers that the Fassbender standing with Crudup when he gets hugged looks more like Walter.

So what if this is the actual situation that unfolds?
1. In the 10 years since Prometheus, David has been experimenting on himself as well as the creatures in Paradise. The experiments on himself have made him partially organic (leaving him somewhat disfigured/decaying) and he has used his human/synthetic DNA to create the eggs.

2. Walter meets David and David hi-jacks Walter, abandoning his now mutilated body for a fresh one that offers him a chance to leave the planet.

3. David (now appearing as Walter) takes the Captain (Crudup) down to the basement so that he can (one) complete his masterpiece organism and (two) remove the team's on site leader as a way to shake things up just enough to keep the others too distracted to think "hey, something about Walter is different."

This would align with most of what's been revealed officially as well as the 4chan leak (which is appearing more credible with each press release).

Of course I could be dead wrong.

"which is appearing more credible with each press release"

I am not so sure... i can make a run down of the 4Chan leak on a Topic and there is a lot that does not add up... only certain parts but then anyone who has seen the 15 Minutes Press Footage and TWO Trailers previous to anyone else could come up with a seemingly viable synopsis/leak...  the TWO main ones do differ in some regards.

Did they see TWO different Screenings and then how much gets screened and left out?

Maybe they both never paid attention to the movie apart from odd scenes, which just happen to be shots for the most part in the Trailers, the 15 minutes Press Footage and on-set released Prop leaks.

So i am on the Fence a bit with this one... i think some of it does add up, but some of it clearly does not.

So each of the new interviews and set reports seem to conflict those leaks, well bring up important scenes those leaks completely forgot to mention...

However the new trailer and set reports etc, do seem to make sense to some of the other leaks from 2 years ago... that was called Super BS by some ;)

However QES

Your points about Walter/David can make sense a bit, as far as if it was Walter and he said it was Safe then indeed Oram (Crudup) would be excused to listen to him.... otherwise we have a potentially more Stupid Character than Milburn on our hands.

BigDave

"I am not so sure... i can make a run down of the 4Chan leak on a Topic and there is a lot that does not add up.."

I was primarily talking about the leak that can be read in two posts here.

So far the parts of the leak that have been confirmed are as follows:

1. "The crew is brought out of hypersleep to answer to the signal, which leads to the death of the Covenant's captain, Branson (James Franco)."

We see James Franco is sick in the Last Supper teaser. It seems this is a setup for his death. As if going into hypersleep sick and being awoken prematurely is perhaps such a shock to his system, he simply doesn't survive.

2. " while Branson's first officer Archer (Billy Crudup) is made captain."

Definitely seems to be the case.

3. "David leads the survivors back to the Engineers' derelict citadel, where he's been living ever since."

It has been confirmed that David's lab is in the hall of heads

4. "David's mind has been warped by the numerous modifications that his creator, Peter Weyland (Guy Pearce), made to his programming"

This aligns with Ridley's recent comments about the film opening with a memory sequence of David's upbringing by Weyland and the revelation of what David is truly programmed to be.

5. "and is obsessed with creating the "perfect organism"."

This was confirmed by the guests at SXSW. David is in fact working on building the perfect specimen.

With all that said, I do think there are two caveats worth noting about this leak.

1. It seems the leaker focused on key plot points and left out all the details. Seemingly keeping it to broad strokes and at times adding in their own understanding of what they saw (which adds some risk of minor inaccuracies to the leak.)

2. The leaker made no mention of the final showdown with the xeno which leaves me wondering if some sequences hadn't yet been added or the leaker simply didn't see the action sequence as relevant to summarizing the plot.

Indeed that is a summary and we can see a few things seem to match, there was a more detailed version though that seemed to evolve in relation to peoples questions.

so it could be a make it up as go along kind of thing. I will have to do a Topic on the 4Chan so as to not be a open spoiler where i can then dissect it and find supporting and supporting evidence.

when i do this, it seems to show that 40% of the leaks are very flawed, and then it appears the whole leaks seem to only cover 50% of the move regardless... so by that token i would say that 20% is accurate and what we will see... but then the Trailers show us the same. (only a small % of the movie).

There's one thing from the VA-article that puzzles me:

'... the platinum blond David and the mousier brunette Walter—who is the new “Ripley” of this series. “It’s the A.I. that’s the real connective tissue of this franchise,” Waterston observes. “People keep saying I’m the Ripley. I’m not. It’s Fassbender.”...'

 Walter survives? That's at least how i understand this part.

@Tiwaz perhaps walter doesnt survive, perhaps it is David that survives (still Fassbender)...i feel that David will somehow use Walter for terrible ends. I feel that somehow at the end of this series of movies David will be there and his creations somehow kill him and then it leads us into and sets us up for the original 1979 Alien. ...The creation stuff that Ridley has talked about repeatedly...Man created David...David creates something that is man's downfall....this same thing is his downfall...so the mechanism for his own demise was his own creation , just as he was the downfall for many humans etc etc and so forth