I saw Prometheus tonight (2D version). I mostly enjoyed it but I thought it dragged in a few spots. It sort of felt like they were spoon feeding the story to the audience, and that always slows things down.
I thought there would be more grab your armrests horror in it than there actually was. It certainly did not have the same tension as the original Alien.
Regarding the odd crew selection...
They weren't picked by some worldwide consortium. The mission was a corporate project and Vickers hand-picked many of the crew herself. It was apparent that she thought the mission was a complete waste of time. I liked that she had her own personal escape vessel – the rich and powerful will still have all the perks in 2093.
The special effects were great. The med lab scene rocked.
This film didn't ruin Alien for me at all. It wasn't as good as Alien was, but it wasn't that bad either.
Please add your comments to the review I posted a few days ago. I said in the review that I did NOT think it was horrible or that it was a ripoff, it was an okay movie. But although it did not ruin Alien, it was directly connected to it and leads right into it. I think that Ridley will veer off into the mythology of these "Engineers" and if so, then I am not that thrilled.