#2 John Cena

One of the most long-awaited heel turns in recent times is John Cena. Although many believe that the time has come and gone for Cena to turn heel, now could, in fact, be the perfect time given his part-time schedule.
Cena himself has always divided audiences. To turn him into a heel character that attacks popular babyfaces and insults the crowd could be one of the biggest storylines in recent times.
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It is remarkable that WWE have not decided to turn Cena heel, although it was spoken about briefly during his feud with The Rock in 2011. Much of the decision to not turn Cena heel is down to his merchandise sales, as well as his status as the face of the company and his appearances with the Make-A-Wish foundation. However, with the role of face of the company gradually shifting to Roman Reigns, and Cena appearing mostly in a part-time role to help get younger talent over, it could be time to turn him heel.
Cena as a heel could help elevate young babyface talents to similar positions that he was in during his younger days, and engaging rivalries could be created along the way.