This is the biggest fight of Bisping's career, it's his time to put up or shut up as a previous poster said. If he loses, he will probably never get the title shot he so badly wants. But if he wins, he would make an undeniable statement as a legit contender who can't be refused a title shot.
I'm a big fan of Bisping so I'll be rooting for him, but if i had to bet on it it's hard not to see Belfort putting him away. It would be awesome though to see Bisping viciously KO Belfort in the first round