A battle between Dwayne "The Rock" Johnson and John Cena would indeed be an exciting showdown, especially given their history in professional wrestling.
Both are iconic WWE (World Wrestling Entertainment) Superstars who have transitioned into successful careers in Hollywood and entertainment.
While they've faced each other in the wrestling ring in the past, a hypothetical battle between them in a different context, such as a movie or some other form of entertainment, could certainly generate a lot of excitement and interest from their fans.