The filmmakers seem to think that if the audience doesn't see something "fresh," then the movie won't sell. I simply don't understand this logic. Continuity combines with nostalgia to sell, far more than any lame rabbit-out-of-a-hat gimmick will. They already tried to play on nostalgia by returning to some of the "classic" Alien and Predator design elements, so why preserve some areas but screw around in others?
If the story isn't fantastic, I'd at least prefer a pastiche of previous films rather than a bastardization of them.