Not anytime soon but if fans ever grew lukewarm to The Rock and grew tired of him coming back but then going away and started greeting him with lukewarm reaction, I believe a short term heel turn could work.
That was kind of what fueled his heel turn a decade ago, because there was a backlash against his Hollywood career and the WWE went along with it and created his awesome Hollywood persona (it was actually Paul Heyman's idea, for the record.). Even then though, they couldn't help but start cheering him again just a few months later. Hell, he got cheered against Goldberg at Backlash 2003.