David, Clones, Oldmen, Tight Leggings?

For starters i thought this was a remake of Poseidon since hearing about it last year, so that’s a good start. Now after watching the trailer, feeling now excited about the film, I had a few questions if anyone can help clear things up? I was wondering if anyone had any thoughts from the trailer shots of the bald man at 0:16-0:18, 1:59, 2:03 resemble the giant head statue at 1:07-1:10? I'm not too knowledgeable in the alien timeline so wouldn't like to guess much, does anyone know what the head is? Oddly Alien it was on TV the other day and i still didn't notice what these SJ things are people are saying are key to everything in Prometheus. This is the trailer I saw all the shots in. http://www.youtube.com/watch?v=34cEo0VhfGE&feature=player_embedded 2:00 is this David transforming? I see flashes of blonde in freeze frames. 2:12 looks like this is binding a SJ suit to the cannon chair the bald man was prepping ready for something? 2:13 ok now this is scary, there is an old man in the suit in the background??? 2:15 pair of legs in the same dress sense as an engineer but too small from what i read? Maybe is the bald man we saw in these style leggings at 1:59, 2:03? 2:17 is that David holding the finger he touched the goo with up saying a metaphor about it transforming him into something greater? I really can't wait for this film!