I'm no longer interested in this film. After seeing these extended trailers, for me it's too slick and too 2012 with regard to cinematography and pacing.
As a prequel, it also has the same issue that bothered me with Phantom Menace. There is a huge technology step backwards for events taking place several decades later. That's a story killer for me. We're seeing Minority Report computers which, far into the future, will become the CRTs of the Nostromo. No thanks.
Plus, I'm just not getting a good vibe from seeing so much about the derelict ship. For me, the Space Jockey will forever remain a mystery, just as he has been for the past 34 years.