Just remember

The moon we are on in Prometheus is Lv-223 NOT Lv 426 So for everybody on this board complaining about not learning anything about 'the' space jockey, and it not leading into Alien Thats because we are on a differnt planetary body! Just watch the film as if it is a standalone film, from everybodies reaction i can see why they were carful to distance itself from Alien in the marketing. Just because its not the exact SJ as in Alien, the story still presents just as much of a mystery as the original. If you want answers then you need to wait for Prometheus 2 or speculate yourself and accept your own answer. Also people seem to be forgetting the great things that the film does... Open up the universe of Alien and bring in new ways the xeno is born, and make it part of a greater universe of biological weapons, speculate everybody maybe the xeno at the end of the film is the queen that will set up nest in the derelict and produce what we know to be the xeno. Perhaps the film is also discussing evolution as it is as much discussing the origin of human life, and in my opinion there is nothing wrong with opening up more questions as much as it is giving answers. Also with anything in life when you are given answers to something, you are always asking more questions. We might not have found out about the exact SJ on Lv 426 but we have found out so much about the weyland company, androids, SJ race etc....