Sources are saying that it looks more promising that Brock Lesnar could well stay with WWE past WrestleMania due to concerns over long term health affects of competing in MMA specifically concussion oriented issues later in one’s life. Again, these are ‘sources’ and how reliable they are can only be judged after WM31 and following the status of the former UFC Heavyweight Champion. One thing is certain, if UFC believes, and rightfully so in my view, that CM Punk will sell PPV’s for at least his first two fights then what would a healthy Brock Lesnar mean to the UFC brand in a time where no combat sport company has a plethora of bona fide star power that can move the needle on the pay per view business.

Hopefully he does stick around.

I don't know what you do with him if he does lose the belt at Wrestlemania. WWE could continue Bryan vs Reigns headed into Summerslam and go with Rollins(c) vs Lesnar there.

Even if they don't know what to do right away, they'll figure it out during the time he's off TV.

If he does stay, have him face Orton at least once while Lesnar is heel....then transition over to a babyface