In 2002, John Cena joined the WWE, and most people thought that he was going to have a very short career. With a limited skill set, and a gimmick that had him as a white rapper, most people simply cou. During Saturday night’s WWE Hall of Fame ceremony, the 15-time World Heavyweight Champion, John. Cena’s appearance as he busted a freestyle. Of course, Cena would have a rapping gimmick as…