I saw Prometheus yesterday and as a big fan of the Alien series I went in with high expectations. Overall I was very pleased and entertained by Prometheus but felt it could have been so much more if the connections between it and Alien were more detailed and clear. Some questions were answer such as the origin and purpose of the Space Jockey from the 1979 Alien film but there was no clear answer to the Xenomorph creation and how the ship with Alien eggs ended up on the planet LV426.
*Warning* Spoilers below....
There is an appearance of a somewhat Xenomorph or the early mutation stage of it at the very end of Prometheus but many Alien fans where looking for the actual Xenomorph that appeared in the Alien movies. Most of the movie focused on the Space Jockeys or "The Engineers" and what their purpose was, the Prometheus scientists discover that the Space Jockeys were doing bio chemical and weapons of mass destruction development and testing on the planet. This planet is not the same planet that Ellen Ripley and the crew of the Nostromo land on in Alien.
The weapon is a black ooze that causes mutations, deformities, and sometimes the breakdown of biological life matter. The black ooze looked like the symbiote from the Spiderman Comics which takes over Spiderman then Eddie Brock who becomes Venom. It is made to seem that the black ooze is the eventual cause for the creation of the Xenomorph either by accident or scientific engineering.
The events of Prometheus take place 30 years before the Alien story which means the early stage Xenomorph at the end of the movie could eventually mutate into the Xenomorph from the Alien movies. But this is not explained or made clear in Prometheus and we don't know if Xenomorph's existed prior to the events in the movie.
I believe if Ridley Scott made the connections more clear the movie would have been perfect. Other than the failed connections the movie was great, lots of sci-fi mesmerizing detailed story telling that keeps you interested. I enjoyed Prometheus and hope there is a sequel to fill in the missing connections to Alien.