5 booking options for John Cena after No Mercy 

3. That long-awaited heel turn

John Cena Could Finally Turn Heel

John Cena has taken a number of lengthy breaks from WWE over the past few years but always returned to the company to continue to put over new talent.

The problem is that eventually WWE will run out of heel superstars and Cena will then be given the opportunity to finally turn heel. There will come a point where John Cena's merchandise sales and the number of make-a-wish children that he meets will lessen as newer stars are born in the company.

Cena would then be free to finally play around with a heel character and do something in WWE that he has never been able to do. It would be interesting to see if Cena played the heel role in a feud against The Undertaker, if WWE still wanted that to go ahead, or if the feud would be played in a manner similar to the recent Roman Reigns saga.