This movie was basically Dances With Aliens -- the characters were SO cliche ("the war-hungry hard bitten colonel", "the greedy heartless corporate henchman", "the noble savage princess", "the dumb marine who finds his inner ecologist", etc.) The plot was mind numbingly predictable. There were a few neat sci-fi ideas, nicely executed, and the production design was awesome, but that isn't enough. Also, at least in my theatre, the IMAX glasses were really heavy and uncomfortable -- 2h40min is WAY too long for a 3D movie, it is too tiring on the head and eyes.