9. Seth Rollins vs. Finn Balor
For all his crowing about being the future of WWE, Seth Rollins's reign as champion -- which begins when he cashes in his Money in the Bank briefcase on Roman Reigns at WrestleMania XXXI -- comes to an abrupt end just weeks later at the hands of Reigns. That drives the entitled Rollins into a frenzy, and though he fails to reclaim the title, he continues to declare himself WWE's greatest champion. This doesn't sit well with brash (yet beloved) newcomer Finn Balor, who begins to taunt Rollins about having botched his chance at immortality. After he becomes a thorn in "The Architect's" side, Rollins makes it his business to take Balor out of WWE. Though he repeatedly attacks the Irish superstar, he can only take him down -- not out. The match is set for WrestleMania.