EVERYONE LOVES A HEEL TMZSports.com
John Cena shocked the wrestling world when he turned heel on Cody Rhodes ... but The Miz didn't bat an eye -- 'cause he tells TMZ Sports he's ALWAYS known he was a bad guy!!
We caught up with the WWE Superstar out at LAX ... and he gloated quite a bit over the fact he called this development from a mile away -- like, more than 10 YEARS ago!!
"Do you not remember WrestleMania 27 going into the main event," Miz said.