The figure standing above shaw in the bio mech suit

Possibly so, or David dressed like his "new" buddies...

David starts hanging out with the tough crew..smoking cigarettes behind the bike sheds and sniffing glue

It's Peter Weyland, rejeuvinated by the engineers bio-mech tech. Physically handing over the humans to them because they won't go willingly. -IMO

Well maybe it could be David we dont really know, i mean the Space Jockey in that scene does look smaller. But some think that Holloway or David become a Space Jockey and Pilot the ship well why would the Blue Guy activate and then walk towards the Chair only to then have some Human/Andriod Pilot it? Maybe the 2nd Andriod is the Space Jockeys manage to create/replicate one? Maybe that Jockey Scene is indeed a Holloway or David, and they perform a little experiement on Shaw that leads to the Squid? There are so so many posibilties with this movie..... But there are still a few questions that we dont really have any explanations for yet... 3 important ones for me are. 1) Whats with the Saucer? 2) How do Eggs get on the Alien Derelict? 3) And who killed the few Dead Jockeys knocking around? A lot of other things the trailers etc have offered us some clues that we can speculate on.

Whoever it is, it looks like they stepped right out of a Giger painting to me. Can't wait to see this movie!

Is it a case that the big bald guy we see activate the chair is just in a flash back part of the story, and he is one of the dead space jockeys, dont think id like that, id love to see him interact with crew.

I personally think it is big enough to be a Jockey, it also matched the Jockey that we see squatting over the green hologram.

maybe Fifield's final evolution? could be David too... I can see that.

So Halloway gets her preggers, he is infected, and she has a mutant in her. He becomes Mr. Tentacles so she cuts it out.

An early news story said RS hired a 6'5" actor to play Engineer 1 and the alien would be done with CGI like Gollum. I like the theory that people are being turned into Engineers. Maybe this one hasn't gown out fully. Remember how fast the original Alien grew....

[b]@Tokyokid[/b] You're close. [url=http://www.youtube.com/watch?v=7OPRuwjfJWA]THIS[/url] is the guy playing one of the engineers. Phil Martin, he's a whopping 7 feet tall. If you check his page [url=http://www.willowmanagement.co.uk/profile.html?p_name=Phill+Martin&p_id=83&order=9]HERE[/url] on Willow management he is credited as an Engineer. [i]Hopefully[/i] the creatures in the film will be animatronics. [url=http://www.youtube.com/watch?v=ddMacGSsivk]Gustav Hoegen[/url] is credited as the key animatronic designer on IMDB.

I also think that the blue figure [url=http://postimage.org/image/re7ora89p/]activating[/url] the chair, is also the figure [url=http://postimage.org/image/tv1iyw2pj/]looming[/url] over Shaw.

Agree

This figure maybe the father of Shaw's spawn. This scene always appears later in the trailer but may well be earlier on in the film.