I wanted to make a joke about a dead wrestler getting a huge pop because he would come to the ring as an actual zombie. But no matter how amusing I may have found the joke, I honestly couldn't write something that tasteless.
I couldn't imagine any wrestler getting a bigger reaction that Steve Austin. He hasn't wrestled since WrestleMania 19.
Stone Cold can't medically wrestle anymore right?
I could be wrong, but I don't think Austin was ever prevented from wrestling due to medical clearance. I think he just made the decision due to the amount of pain he was in whenever he wrestled. Generally the guys who are not medically cleared will not have any physical altercations with anyone. If you noticed a while back, Hulk Hogan, Ric Flair and Shawn Michaels were all in the ring and the Big Show was there. Flair was the one who attacked Big Show, which you figure had to really irk Hogan, who visibly stepped back out of the way when Big Show came into the ring. But Hogan has not been able to get medical clearance and therefore couldn't be involved in any physical altercation. Austin has routinely hit guys with stunners on many and most of his appearances. I think he can probably be medically cleared, he just has no desire to wrestle again. In fact, he hit Xavier Woods at WrestleMania 32 with a stunner and I think if he couldn't be cleared, they wouldn't have let him do that.
I'd like to think Punk would get a good reaction but who knows. I think enough people are still sore about him leaving and he probably will take some jeering from fans if he does come back, due to that humiliating MMA loss.
For realistic entries, I think Shinsuke Nakamura will get a huge reaction if he appears. Uh...hmmm... But yeah, I can't think of any realistic entries that would get a better reaction than Austin would. I don't even think the Rock would at this point as his most recent appearances have been very lackluster and way too aimed at nothing more than giving the product a cheap boost.