I think that is an Engineer (Jockey), It makes sense to have him create man in his own image and that ties into the giant head, its just we've seen the SJ from Alien as a creature/alien as it looks in the chair, I mean why wouldn't we?
ITs disappointing that they may be humanoid in form but I'm sure they are portrayed amazingly well in the movie, you cant make a film like this and have a Jar Jar binks Disaster, I mean the hole industry leaned from that I think.
I still actually dont thin k its the same Ship from Alien, if it is then great but I really dont want it to be constantly linked to Alien as a film just to be a great film is more than enough. I have to say the fake or not so fake synopsis seems to make more sense now I've seen the Trailer. Not sure if its a blag but elements do match.