Has lots of potential for the sequel

Rating: 6/10 (27 January 2016)

LOTS OF SPOILERS Alien was a great space/horror film so I was looking forward to the prequel by the same director, Ridley Scott. Prometheus is a beautiful looking film but lacks the natural acting style of the original, despite the stellar cast. Noomi Rapace was brilliant in the Girl With the Dragon Tattoo trilogy; Idris Elba, Charlize Theron and Michael Fassbender are all excellent actors. A mistake in the editing made the casting of Guy Pearce as the elderly CEO of Weyland Corp. an odd choice.
The introduction of the Engineer creating life on earth, or humans anyway, was wonderful and an exciting concept. Unlike other reviews, I didn't mind that the Engineer on the Prometheus planet was both curious and violent, like a child pulling apart an insect or stomping on ants. We evolved from the Engineer so that says a lot about our irrational behaviour. Like David the android asked, "Why do you think your people made me?" Charlie Holloway: "We made you because we could." David: "Can you imagine how disappointing it would be for you to hear the same thing from your creator?" It's funny to think that we imagine qualities about our creator that we don't have ourselves.
The most exciting part of the film was the spaceship from the original film, then the Engineer in what turned out to be the space-suit of the Space Jockey! I eagerly watched to the end to see how the Engineer/Space Jockey was infected, then waited for him to get back into a Spaceship (the android said there were many on the planet) but the original Xenomorph burst through him while he was lying on the ground! So I re-watched Alien to make sure my time-line was correct, then read the explanation on this site that Prometheus wasn't a direct prequel, just something that happened in the same solar system! WTF! Why go to all that effort when it could easily be a prequel? So the alien blood(?) infects a human that then mates with a human to create the being that then attacks the Engineer/Space Jockey to become the Xenomorph. It is never clear if it's impregnating or using the human/Engineer as a host, but at each 'rebirth'it gains another stage of development until it turns into the Xenomorph in Alien.
So the egg that appears in Alien that opens to enter Kane, is using him as a host, not for DNA like the Engineer, or the Xenomorph would become something else again? So how did the eggs from the original Xenomorph get to the Alien planet LV-426? Presumably the Xenomorph burst through the chest of a different Space Jockey/Engineer who flew to the planet but he must have been on the Prometheus planet LV-223 first, landing after Elizabeth Shaw left, so he could get attacked by the Elizabeth offspring.
Did anyone even bother to sit around a table for 10 minutes and work this plot through? Why spend so much time and money on a movie when the story line is full of plot holes and ridiculous mistakes (see other reviews)? I really want this movie to redeem itself in the sequel, so please get some decent writers who can be bothered making a cohesive story, and tie up the multitude of loose ends. The memory of Alien deserves better.