Avatar, Has Sci-fi Found Its Heaven's Gate?

brumgrunt writes "Den Of Geek wonders if James Cameron's Avatar is heading for a fall, and if it will even be a science fiction film, off the back of the previews shown last week. It writes: 'It seems in Avatar that all this gee-whiz science is merely there to draw the "old crowd" in and provide some kind of rationale for a brightly-coloured fantasy-world which reflects the most emetic of the artwork plastered over teenage girls' MySpace pages.'"