4. CM Punk
I know, I know we all saw this last year, but before people click over to the next slide to see who is the third most likely, hear me out. CM Punk attempted to beat the Undertaker last year by totally disrespecting him and his friend Paul Bearer in order to attempt to get any sort of win to break the streak. That obviously did not go to plan, but say Punk finds himself in a similar situation that he does last year, without a dance partner and an angle and voices his annoyance. But then, he challenges the Dead Man for his streak again, claiming that his partnership with Paul Heyman made him weak and it was the Undertaker that showed him that. He therefore challenges again to prove to the world that this new, improved CM Punk can do what last year's could not and end the streak- not because he disrespects the Undertaker, but he respects the Undertaker enough to believe his last match should be with the Best in the World. I think there's a modest chance of this occurring and I think there would be a fair shot of Punk actually managing to break the streak this year to push him (along with Daniel Bryan) as the new big stars of the WWE.