Promethues didn't introduce something new, just brought on board the ancient aliens theory and added a lot of unexplained nonsense... hell, Damon "Mr. Lost" Lindelof walked out of the sequel because not even him could explain or give a direction to all the bullshit he included at that movie =/
I mean, I loved the movie, it was a great nostalgic throwback to the original Alien, but doing it just once again becomes unacceptable this time...
The only difference with this one is going to be that this time it will actually tie in with Alien, but that's just bad planning, Prometheus could have finished with the Jockey crashing on LV-### (whatever number it was the Alien derelict ship) and then there wouldn't be any need for this movie.
Just greenlight Blomkamp's sequel, god dammit :/