#5 Kevin Owens

Kevin Owens had a sketchy 2017. On one hand, he had multiple title reigns and one awe-inspiring moment when he headbutted Vince McMahon on live television. On the other, he really hasn't been able to escape the midcard, and now that he's been paired with comedy character Sammi Zayne he might have lost all steam. Still, the new year could be a turn around for Owens.
Chances of him ruling 2018:
Right now, it doesn't look good. Recently, he and Sammi Zayne were sent home from a WWE tour of Europe for botching a match's ending, possibly on purpose. The fact that he's gone from deadly serious to being the straight man in a comedy act doesn't help matters much.
But Owens is a phenomenal wrestler, possessed of a deep moveset and a near perfect blend of power and agility. So, he could be the dark horse of this list, and totally own 2018 before the year is up.