WWE superstar John Cena, returns to the ring on Sunday for the 2017 Royal Rumble. Of course, Cena is not competing in the battle royal himself, instead Cena gets the opportunity to win his 16th world championship. Many were surprised when it was announced that Cena would face off against 2016 sensation AJ Styles, in a world championship bout. After all, Cena rarely enters the ring these days, his film and TV work keeps him busy elsewhere. Nonetheless, AJ Styles vs. John Cena is a mouthwatering prospect for WWE wrestling fans.