#4 Why he will - To get even with WWE
In what may be the biggest understatement in wrestling history, CM Punk did not leave WWE on good terms. Since departing the company in 2014, he has no made secret of the fact that he detests the front office and the way things run there.
He shed light on just about every darkness within the company including Vince McMahon's political hypocrisy and the way in which WWE cares for its wrestlers medically. He also promised to never return to the company and everything he said was very believable.
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The remarks were incendiary enough to draw the ire of his former company. Both Punk and Cabana were taken to court over claims Punk made about WWE Dr. Chris Amann. Ultimately, the two wrestlers won the court case against them, but the lawsuit was expensive and arduous. CM Punk would like nothing more than to give the company that went out of its way to destroy him the proverbial finger by joining its chief competition.
#4 Why he won't - He's done with wrestling
The internet loves to chat and since Punk's pro wrestling retirement in 2014, there have been plenty of rumors about his return. Despite the near constant rumblings, the former WWE Superstar has been clear: he will never return to professional wrestling.
CM Punk is constantly questioned about a professional wrestling return, yet his response hasn't changed.
He recently told TSN's Aaron Bronsteter,
"I'm done, I'm done, I'm done with professional wrestling."
For those that missed it in the back, he said he was done three times in only one sentence.
When Punk was being sued by WWE Dr. Chris Amann, he had the opportunity to talk about his WWE career, but didn't wax nostalgic in court. The memories were painful and induced tears in court. CM Punk doesn't look at wrestling as fun anymore and can no longer separate the sport from the suffering it caused him. He's done, he's done, he's done.