#2 Rusev

Rusev is currently in a feud with R-Truth, working alongside Shinsuke Nakamura. But what if he turns his focus away from the United States Championship towards the WWE Championship? He remains one of the more popular superstars on the roster, despite turning heel on Smackdown for no apparent reason. Rusev, alongside Lana, has also voiced his displeasures at WWE when the couple appeared on Lilian Garcia's podcast, Chasing Glory.
It seems like WWE might do something to curb some of that unhappiness, by adding him to the Elimination Chamber match. The Bulgarian Brute could have a strong showing, solidifying his weird heel turn before embarking on a possible partnership with Nakamura. WWE failed Rusev massively in so many ways, ending Rusev Day way too soon and not going all in with him. A WWE title match on pay-per-view might be a decent consolation for him.
John Cena's last PPV's name revealed by Kurt Angle? More details HERE
But then again, that has already happened before. Rusev deserves so much better than what he has now.