#4. Roman Reigns would have become the babyface star that WWE wanted
It was clear from 2014 onwards that WWE wanted Roman Reigns to become John Cena's successor. By late 2015, John Cena had finally begun his transitional phase from a full-time Superstar to a part-timer.
It was well-deserved, but you're probably familiar with how WWE butchered Roman Reigns' push in 2015. While the intention was for Roman Reigns to become the new face of WWE at WrestleMania 31, it all went wrong, and at Royal Rumble 2015, he was booed out of the building.
Corey Graves deleted his Tweet! More details HERE.
The biggest obstacle that Roman Reigns faced wasn't even his own fault. Vince McMahon wanted him to become a carbon copy of post-2008 John Cena, so it seemed like Roman Reigns was set up to fail.
But a heel turn would have helped Roman Reigns develop the personality and character that we're seeing now. It would have been a role that he would have been comfortable with, and a new Roman Reigns with more personality and attitude would have translated well as a babyface.