Yes I agree, the similarities are there, but I just googled and read what Ridley Scott said in an interview last year. However, that interview was pulled! Strange eh?
Either way, it looks great and even looks more 2001 Space Odyssey (the trailer) than Alien. Lots of good content for a story there with the Space Jockey and all. A must see day one even if it sucks. I always have my fingers crossed when seeing these flicks hoping that one day the golden era of sci fi (80's - 90's) will return even for a little while.