#2 Putting over younger talent

John Cena is infamously known for burying young talent. His run during the 2000s may have caused several fellow wrestlers getting overlooked, but recently The Cenation Leader has been putting a few stars like Elias, Kevin Owens over him, which was a welcoming change for the WWE Universe.
The best way to get a babyface over with the crowd is by having a top-level heel put him over. Cena as a babyface putting a younger performer over doesn't seem very convincing. If WWE wants to turn John Cena heel, now would be the best time.
Breaking Vince Russo and Jim Cornette update HERE.
WWE has had an influx of indie wrestling talent in the company who are waiting to get the main event spot, and a heelish John Cena would be the perfect person to do the honors. Anyway, Cena has nothing to lose, as he's already one of the most accomplished wrestlers in WWE history.