I'm also wondering what role the Space Jockey ship plays in all of this. The trailer seems to indicate that it crashes, and we also see a shot of the gunnery position without the aged creature sitting in the chair. That said, the trailer looks amazing!
Small point, but given that the shot of the giant holographic display appears to be the same room as the Space-jockey chair, I think it's safe to say that it's a navigation room/flight deck, not a gunnery station.
I don't know why, but I'm kinda getting an Event Horizon feel from some of this. As if whatever the crew encounters somehow makes them go mad and turn against each other.
If that's the case, I hope Ridley handles it a lot better than that movie did.
I think this has more to do with how much Event Horizon
borrowed from the original Alien
than anything else.