John Cena is the WWE Champion, which is no surprise if you've been a WWE fan for more than a year.
However, a new challenger has risen to take on WWE's favorite son.
Ryback, who has, in fact, had several WWE Championship matches with CM Punk, has never tasted gold in WWE. And he is hungry for it.
At WWE Extreme Rules 2013, Ryback will try to satisfy his appetite and take John Cena's championship. But Cena, who just won his first WWE Championship in about 18 months, is not about to give it up without a fight.
Cena and Ryback are two of the top stars in WWE right now, and a quick feud would be the worst thing to happen to this budding rivalry.
Here are four reasons why.