Will Rey Mysterio or Sin Cara Turn Heel?

We noted earlier this week how WWE is planning on putting the Tag Team Titles on Rey Mysterio and Sin Cara so they can build to a WrestleMania 29 match between the two. In an update, there has been at least some talk of making Rey Mysterio the heel while Sin Cara works as the babyface. With that said, some believe it would be a very bad idea for Mysterio to turn heel.

We really cant see the Rey Mysterio heel turn happening. It would hurt the merchandise sales way to much!