Well, I think a lot of people will be disappointed. Not because it’s bad, but because it’s different from what they’re expecting. It’s definitely not an Alien movie. Alien was horror in space. And, for me, Prometheus is pure sci-fi. To enjoy it, you have to be as open-minded as possible and accept the movie Ridley wants to show you, not the movie you dreamed of. So, forget Alien, you won’t have any answer to your questions. The only thing you’ll learn is who the Space Jockeys are and what they look like.
Personally, I enjoyed it a lot. Fascinating and beautiful.