Bingowings said:

I don't think it's the same ship.

I agree with this/ think this is the case. I've only seen the trailers and read the recent Scott/Lindelof Q & A.

It's my belief that there are multiple 'derelict' ships, as seen in Alien, around the universe and this movie focuses one one (or more) of the other ones. Maybe they go around the universe 'giving fire' to humans and/or other species. So the space jockey we see in the trailers isn't the space jockey, just the pilot of another ship, so to speak.

I also think that Scott was intending on making an alien Prequel but when Lindelof came on board and the script changed this tangent was created.

Either way I'm pretty excited. I love the cast.