As much as i'd love to see it, it shouldn't happen. Let Shawn stay retired.
If we were just talking hypothetically, i'd think he would want a big revenge match against Lesnar. Though failing that, maybe a match with Bryan? I mean imagine those two together. Great charisma from both. Great selling. Hell, imagine the selling between Ziggler and Michaels? Haha.
Mick Foley on the 2014 Royal Rumble