9. CM Punk
CM Punk is at his very best as a heel. He is a naturally grumpy character who is pi**ed off at the world. As a good guy Punk has been decent, but you get the feeling that WWE only turned him face to begin with so that they could do a Punk Lesnar feud. Now that feud is over, Punk has been slightly lost in the upper mid card in average feuds with Ryback and The Wyatt Family. A heel turn would put Punk back in the driving seat of his character, able to play to his strengths of being a nasty self obsessed ass kicker. It would allow Punk to return to the main events, he would be a perfect opponent for John Cena after the World Champion disposes of Alberto Del Rio. The Cena Punk feud has been one of the best feuds of this century, the promos and matches have always been great. A Punk heel turn could facilitate a match for the pair in the main event of Wrestlemania for the title, a stage that this feud has always deserved. The other bonus of having a heel Punk is that it would allow him to battle with Daniel Bryan again. The two best wrestlers in the company could have an excellent series of matches, and the super over face of Bryan would be the perfect contrast to the heat a heel Punk gets.