5 massive heel turns that can change the landscape of WWE: Goldberg attacks superstar he has real-life heat with, tag team splits after 7 years  

#4 Former WWE Champion Rey Mysterio

It's unimaginable to even think of former WWE Champion Rey Mysterio as a heel. That is precisely why his heel turn will send shockwaves across the world of wrestling. Unlike other superstars who have changed their characters multiple times in their careers, Mysterio is one character that has remained the same throughout his time in WWE.

With Rey Mysterio currently being the SmackDown Tag Team Champion along with his son Dominik Mysterio, the story writes itself. After the duo loses the titles, Rey Mysterio could gradually become frustrated with Dominik and how the latter cannot live up to the family name.

This might lead to a brief program between the father and son duo, with Dominik getting a win over his own father. Such an angle could help Dominik break away from the image of riding his father's coattails.

It will be interesting to see how Rey Mysterio pulls off a character that isn't a squeaky clean babyface. A change in character would also help Mysterio reinvent himself as his current persona has gotten a bit stale.