HD trailer can be found here!
It actually reminds of a book I'm in the middle of right now, Edgar Rice Burroughs' 'The Mastermind of Mars,' which came out in 1927. It's the 6th book in Burroughs' Mars series, and, so far, is centered around a man from Earth who works for a mad scientiest of sorts that has the ability to transfer one person's mind into another individiual's body. The man from Earth falls in love with the mind of a beautiful woman who was forced to switch bodies with a wretched hag (so she's in the body of the hag). It seems to be kind of oppisite in 'Avatar', as the robot from 'Terminator: Salvation' is doing the body-hopping and the alien chick is falling for him, but you get the point.