Obviously he will never become a champion, or a contender, or a Top 10 fighter. However many people talk as is CM Punk is some random skinny dude with absolutely zero training that is going to fight against professional fighters. That is not the case. CM Punk is much better than people think. First of all, there are some factors to be aware of. 1.- He is very tough! Pro wrestlers are not real fighters, all what they do is scripted, all of them would get destroyed by a Top 3 MMA fighter. However they are very very tough. They are actors, but all of them do a lot of weigh training and are physically very very strong. It is actually not easy at all to be a WWE superstar. They get hurt a lot, they are on the road the whole time (and that means a lot of uncomfortable stuff) and not anyone would be able to endure all of that. Punk will be training very hard, and he will endure all the pain, because he is mentally and physically very tough. 2.- He is used to the crowds. Even though it is a different situation, he is very used to perform knowing that millions of people are watching him. I don't think he will freeze out there. 3.- He has already some knowledge. I saw a video of him with a Gracie and other dude showing some BJJ techniques. He looked very smooth and absolutely effortless. It means that he obviously has trained and know some stuff. Is he a black belt? No. But he is already much better than a white belt. 4.- He is training at a Top camp and still has many months left. Training striking with world class strikers and training grappling with a world class wrestler. Knowing that he will fight in about 9-10 months, he will learn plenty of stuff in that period of time. 5.- He understands the danger he is in, so he will train like a beast. He knows that he put himself in a very risky situation. He knows that he will be fighting against guys with much more experience than him, and he knows that his only chance of doing good is to train like a beast, and he will do that. 6.- His opponent will probably underestimate him. So, in conclussion, I am not saying that he will win his fight (It depends a lot on who is going to be his opponent), but I am saying that he will come much better prepared than people are expecting. They are expecting a punching bag that will get destroyed in 20 seconds. That is not the case. He will show that he has knowledge and he will do OK, winning or losing.