John Cena is WWE Undisputed champion. John Cena defeated Cody Rhodes at WrestleMania 41 to win the WWE Undisputed championship. Ethan Miller/Getty ImagesMay 10 | Backlash: John Cena defeats Randy OrtonCena beats his old foe in his own hometown of St. Louis, one last time. That could also lead to a huge surprise such as John Cena showing up unannounced at a TNA event. December | Saturday Night's Main Event: Cody Rhodes defeats John Cena for the Undisputed championshipThe torch is passed in Cena's hometown of Boston.