Not in a million years. Why would you take a character that's trying to gain popularity to dump on a guy that's not even with the company at the moment? He gains nothing from that. They're taking paying customer's signs that refer to Punk out of the crowd. So why the hell would the talent talk about the situation? It would never happen unless Punk's return is set in stone. Plus, Vince would never approve that in a storyline without Punk's approval. If that were to happen, that would only piss off Punk even more and you could kiss one of WWE's biggest assets goodbye for good.
It would be like Barrett standing on his crane telling the world how he's better and more legendary than Hulk Hogan or something. It would never be proven and he's just standing there talking looking like an ass unable to prove it. Hopefully we see Barrett in a legit feud here soon. But in this situation here, Barrett doing anything in the realm of addressing CM Punk is irresponsible, dumb, and pointless.
It would significantly increase Barrett's standing as a heel, if it's the start of them using the gimmick correctly, he could be the top heel in the company in a few months. The only other real top heels are Lesnar, Orton and Batista if they turn him, and Lesnar is never around for more than a few weeks and people are tired of Orton and Batista already.
As far as pissing off Punk . . . well honestly what
doesn't piss off Punk? I like him as much as the next guy (really was the only interesting thing in the WWE in a really, really dry spell) but they gave him the longest run with the most important title in pro wrestling in the past 25 years, let him feud with anyone he wanted to on the roster, and he has been the focal point of the show for the past 3 years and he still left them at the most important time of the year.
I'm not saying they should go out of their way to burn bridges, but Punk has never pulled punches when talking about his displeasure with the WWE, so honestly I think it's acceptable for the WWE to let Barrett handle the situation in a semi-light hearted way and in the process probably make him one of the most over guys on the roster. Punk might never come back, Barrett has potential to be a top heel with this gimmick. Is he supposed to keep trading corny comebacks with Jerry Lawler?
It can't be any worse than when Ross and McMahon buried Austin on RAW.
And worse case scenario, Punk goes to TNA or ROH, shoots, causes a one night ratings spike, and wrestles for half filled arenas and high school gyms for the rest of his career.
I say make a star in Barrett rather than appease to a dude who doesn't even really like the WWE in the first place. The WWE isn't going to change as far as putting star part timers over workhorses (which ironically is what will happen if Punk comes back in a few years at the Rumble) and silly booking decisions, so fuck it.
Vince doesn't care about Punk's feelings, he just cares about his star power. Well, this is an opportunity to make a star.