it's not brock
http://forums.somethingawful.com/showthread.php?threadid=3450855&pagenumber=17#post399085110
He's not itbegins2012. I went over this before. Even if he's out of his contract tomorrow he cannot be itbegins2012. For that to happen WWE would have had to negotiate with him while he was under UFC contract. They would lose a massive contract tampering lawsuit. With what they wanted to do last year they had to go through Dana White no matter what, but if they went behind his back and arranged for Brock to retire if he lost? They'd be hosed.
On top of that Brock just signed a massive multi-fight sponsorship with Everlast. He is going to reconsider this retirement when he is reminded of that contract.
It is remotely possible that WWE could throw a bunch of money at UFC to get Brock for WM, or to buy out his contract in general... I guess? The former is really unlikely given they already have the Rock, why pay big bucks for a second one and done guy for WM?
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comin to your screen, straight from the magazine
http://www.youtube.com/watch?v=k_-LPPdHEyA