This is the biggest major storyline that WWE could do to really shake things up: the John Cena heel turn. Is it likely? Probably not. Cena seems to be locked in as the top babyface in WWE that is marketed to kids more than anybody else and is the least likely person to turn heel. That's why it would be a great idea. The most famous babyface turned heel was Hulk Hogan. That was in 1996. Hogan became a main event performer in WWE in 1984, so it was 12 years as a babyface in WWE and WCW. Cena's been in this babyface role for about that same amount of time too because he turned face in 2003. Since Cena is this generation's Hogan, the comparison is very fair to make. What WWE should do is look at how big of an impact Hogan's turn made on the business. After that happened, WCW took off, surpassed WWE in the ratings and it stayed like that for a couple of years. It was the biggest difference maker during the Monday Night Wars. What's unique about Cena's potential turn is that he's already booed by some fans nearly every week. The reason for that is because he's become stale as a babyface that doesn't say creative things or do anything controversial. Plus, he wins more than anybody else. Some people are sick of him. If he turned heel, the ones that are booing might end up cheering because he would have more of an edge, so maybe a turn would backfire. WWE likes him in his current spot and it's easy to see why. However, that heel turn is something that should be considered just because it could be a difference maker in terms of getting more people watching WWE just to see what heel Cena might do. Cena turning heel is that one thing WWE could do if they really get desperate, but it doesn't seem likely that it will ever happen.