6. Cesaro
Although Cesaro hasnt engaged CM Punk in a proper rivalry yet, the two could enter a programme together based on the fact that Paul Heyman now manages the Swiss superstar. Following Punks failure to end the Undertakers streak at Wrestlemania, Punk and Heyman entered a rivalry which involved the former WWE Champion taking on a variety of his former mentors protégés including Brock Lesnar, Ryback and Curtis Axel. This is something that could be revisited, especially considering that Heyman mocked Punk shortly after his departure when he came out to his entrance music, tricking the fans into believing that Punk may actually be returning.