#2 WrestleMania 31
The winner of the WrestleMania 31 main event was notable for a number of reasons, not just because he was a heel. First, Seth Rollins, by winning this match, became the first man to win both NXT's and WWE's top championships. Second, in doing so, Rollins also became the first man to successfully cash in his (dented and nearly destroyed) Money in the Bank briefcase on wrestling's biggest stage.
Rollins inserted himself into the championship contest between challenger Roman Reigns and The Reigning, Defending, Undisputed WWE World Heavyweight Champion Brock Lesnar at the most opportune time, waiting until the debut of Suplex City and numerous F-5s had weakened the challenger, and a flurry of Superman Punches and Spears had left Lesnar unable to capitalize on hitting one final F5 out of desperation.
While the two advertised competitors in the main event struggled to regain their breath and take the win, Seth Rollins's music sounded through Levi's Stadium as the Iowan sprinted down the long entrance ramp, briefcase in hand. The match was officially ruled a Triple Threat Match, and The Architect set himself on a history-making offensive.
Rollins's win might have been the fourth heel victory to close out WWE's shining star of its pay-per-view schedule, but it was undoubtedly the most unique, and probably the best-received: Rollins received a hero's welcome at the next night's RAW taping for preventing a Reigns victory (but, in true heel form, turned the crowd back against him within moments).