it almost seems like, to me at least, what were being shown in the trailer is just such a small portion of the movie... like pretty much just the shit hitting the fan within the first 30-45 minutes perhaps? obviously from previous posted stills with the burned remains of the engineers on the stairs, there may be A LOT more that happens.
and im very curious if during the egg scene where the facehugger jumps out, if dear ol Fassy is David or Walter in that shot.
also, theres the whole thing with the lab david has built in the photo that leaked... curious how much of that will play into the film.