NOTE: This is not meant to be taken seriously as it probably wouldn't happen. But imagine it did.
Roman Reigns is close to winning the Rumble. He also maybe manages to beat Kane's 11-elimination statistic.
However, he hasn't won yet. In the other corner is Ryback. The man nobody would expect.
Ryback eliminates Roman Reigns to go onto face Brock Lesnar at WrestleMania, after Brock managed to defend against Cena.
WWE decides to add salt into the wounds of CM Punk, letting Ryback headline WrestleMania and win the championship there.
(Probably won't happen. But at the same time, would not be surprising as a "Fuck you" to CM Punk.)