2. John Cena vs. MJF: The most polarizing babyface vs. the most hated heel

Say what you will about John Cena, the man deserves his flowers at this point. Although he's been protected by WWE for the majority of his time with the company, Cena has justified his position at the top of the card.
Even those who look on with hatred acknowledge the on-the-spot and natural promos Cena churns out whenever he enters the building.
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Part of what makes Cena untouchable on the mic is his ability to spin anything to his benefit, sliding sly references and layering his promos in a provocative way.
MJF, on the other hand, is raw brutality; if he thinks it, then he'll say it in the most dastardly way possible. Mic work aside, Cena has shown versatility in being able to put on well-worked matches with a variety of opponents.
Cena's back catalogue of classics highlights his ability to work with technicians, powerhouses, high-flyers or in-ring slime balls like MJF.
While some clamour for revered in-ring talents to "fight forever", if these two promo goliaths ever come to blows, the chant has to be "talk forever".