Here is the main reason I think it's Jericho. A while back Punk's contract was about to be up and he wanted to walk out because he thinks he wasn't being treated fairly. A lot of people have been speculating that the reason WWE pushed superstars like Punk, Bryan and Ryder was for them to fail and show that he is right and the IWC is wrong. Vince gave Punk multiple title reigns and even let him work commentary to keep him on tv when he was injured. I think Vince took it as a sign of disrespect when Punk wanted to leave after all Vince had done for him. Also Punk walks around as if he is God's gift to the WWE and ascts as if he is above people like the Rock(who left after paying his dues as opposed to Punk's leaving). Now what does this have to do with Jericho? I believe the Vince is bringing Jericho to squash Punk. Part of me even thinks that the whole reason he gave Punk such a great contract deal, new shirts, new angle, new song, ice cream bars, title etc was just to keep him around for this squash. Vince doesn't seem to be the kind of guy who likes to take demands, especially not from someone like Punk. It's been said here many times that Vince doesn't like people that were made outside of the WWE. Vince knows that Jericho can and would willingly squash Punk. Hell Jericho himself expressed his discontent with Punk stealing his material. Now Punk is known for his mic skills and his ring work. Punk's mic skills pale in comparison to Jericho's. Punk is hit and miss with his promos. Jericho can cut an excellent promo on command every single time. And Jericho is excellent at making fun of people. He's the type of person that would expose every single fallacy about Punk, if given the go ahead by McMahon, and the beauty of it is he can do it while keeping it Kayfabe or by doing what Punk thinks he is doing by breaking down that "fourth wall". As far as in-ring ability goes Jericho far exceeds punk. He is far more dynamic and could carry anyone IMO. Not to mention if Punk where to botch anything in his match I doubt Jericho would hesitate to make it known. This is the guy that, once WWE went PG, would say stuff like "get up you big stupid" to an opponent to mock the fact that it's PG. So given that I don't see Jericho showing Punk any mercy considering that he already has a problem with Punk and, if my theory is correct, has permission from Vince. There is already talk about pulling the strap from Punk, as well as moving him the the B show. I honestly believe that Vince wants to bury Punk and is using Jericho as the shovel. Jericho will come and destroy Punk in every area. Especially if Punk were to try and "shoot" with Jericho. Jericho is well established, has nothing to lose, and is well off without the WWE. I believe this to be a favor to his former boss. And the icing on the cake is that the IWC wanted Jericho to return and the squash would be a legit one, rather than a written "de-push". Punk being embarassed by Jericho and losing to Jericho would be a very believable thing. Also, the fact that it's Chris Jericho, and the fact that he has been hyped so much, will allow Vince to squash Punk while simultaneously boosting ratings. This will only give him that much more reason to pull the plug on Punk's push as he can use the ratings drop against him. If the ratings go up when punk is being squashed that is a way for him to "legitimize" the squash.
If the female in the video is Stephanie, as many have speculated, then this would only further my burial theory. Not only because of the on-screen disrespect, but the fact that Punk disrespected her father by trying to walk out in real life. If it's Stephanie, then I think she will almost be an insurance policy to amke sure Punk is properly buried. Punk seems to have this infatuation with "shooting" as of late and if he gets backed into a corner by Jericho and decides to "cross the line" with any of his promos or tweets, Steph has the power to punish him. Not to mention her husband is running things. If my theory is right Jericho will be able to provoke Punk further and further until Punk pulls the trigger on himself, so to speak, by crossing those in Power. Vince is not the person to mess with, because he will go out of his way to get even. He is very clever when it comes to these things.
The last reason that I think it will be Jericho is the fact that, with this amount of hype, it has to be a big star. Who are the biggest stars on the roster? Cena, Kane, Miz, Del Rio, Punk. Del Rio is injured, Miz is in an angle with Truth and Cena is in an angle with Kane which leaves Punk as the only person high enough on the card to feud with the returning superstar. Who better for a Punk feud than Jericho? In a way, the IWC gets what they've been demanding, which will take the blame away from Vinny Mac. He gets to have the last laugh in all of this and no body can blame him because he is, in a way, only fulfilling our requests. Thoughts on this?