#2 Brock Lesnar destroys Cain Velasquez to remain Champion
At the end of the day, Brock Lesnar has been portrayed as one of WWE's ultimate fighting machines ever since he first made his debut. Much like he decimated John Cena and Randy Orton in previous altercations, I can absolutely imagine him grounding and pounding Cain Velasquez on the mat, to prove his superiority in the WWE roster, as the top dog of the company. And then Paul Heyman can boast about the fact that Brock Lesnar has managed to shake off the ghosts of his MMA past.
It would be a waste to have Cain Velasquez lose all his steam in a match in this manner, but let me counter with 2 words. Kofi Kingston. Here is a man who had been built as a top-tier performer after spending years in the mid-card and WWE pulled out the rug from under his feet when they realized that they needed a mainstream star like Brock Lesnar to carry Brand Blue.
Maybe this match ends in a TKO like an MMA fight does, with Cain Velasquez being unable to continue after taking a beating. With the scores settled at 1-1, the two men could have a match at WrestleMania to determine who wins the rubber match.