We don't know who, when and where CM Punk will actually be fighting, but his mentor and WWE personality Paul Heyman has some idea as to why.
While the vast majority of professional athletes are motivated by things like money and self preservation, Heyman says that's not the case with Punk.
"I don't think money is the motivating factor in CM Punk's life whatsoever. I think it's the challenge to do this," Heyman told professional wrestler Steve Austin on his podcast (via FOX Sports). "This is something he's been eyeballing since he was a kid, and I think he looks back and he probably regrets not getting into it five or six years earlier, but this was the time to pull the trigger on it.