Not sure about all the bad reviews, I enjoyed the movie.  I'm guessing because I wasn't expecting it to be particularly cerebral.  Its a sci-fi/horror flick, I was looking forward to Sir Ridley Scott coming up with new and disgusting ways to terrorize the cast and I wasn't disappointed.  Of course, the android going rogue was pretty obvious, but if the Star Wars franchise can feature a planet destroying space station in 3 of 7 movies, I'll give Sir Ridley a pass.  If you are looking for the loose ends from Prometheus to be tied up, I suggest you include Sir Ridley in your prayers so he can survive long enough (the man is friggin 80) to film the prequel to _Covenant_ currently titled _Awakening_ that will hopefully meet your expectations.