I think that when they are showing the results for the title match poll they will show another promo with it crashing the system and the winner of the poll being Y2J!!!
I 100% agree with this, as it'd be unique to a sense & it'd be a perfect way for him to come back. There is one major flaw in your theory, but I'll get to that in a moment. First..
The reason this WOULD work, is because everyone wants Chris Jericho back in the worst way. They no longer care what way, but if he were to return in this form, it'd cause everyone in the arena to explode for the Main Event.. which is what W.W.E. mainly pulls for. Plus, this has to be the end all - be all to perfect debut ideas, considering Jericho's computer based/matrix style promos.
Hoever, the reason why this WOULD NOT work.. is because of this..
Shawn Michaels JUST returned. While many argue that he doesn't deserve a chance to become W.W.E. Champion right off the bat, everyone would likely argee that they'd want to see H.B.K. get revenge on Randy Orton. (maybe not everyone at this forum, but overall, the general public would rather see H.B.K., period) And by removing all the 3 choices & replacing them with Chris Jericho.. while I still don't think they'd (the fans) be upset that much.. I doubt W.W.E. would waste H.B.K.'s return like that.
So, to finally add my own theory.. why not combined the two? Think about it this way..
Have H.B.K. win by 60%, with Kennedy & Hardy each getting 20%.. then have your computer glitch erase the names, only to reboot them.. minus the %'s... THEN, have Jericho's name appear, with 30%, H.B.K.'s name appear with 30%, & Kennedy & Hardy's both still with 20%. That way, it'd ultimately be a tie.. with the match being switched to Randy Orton v. Chris Jericho v. Shawn Michaels.
That would factor in a great return for Jericho, & still keep Shawn Michaels in the match. PLUS, as I doubt Orton would lose the Championship.. it'd allow Orton to go over either one of them, due to the other's actions. (for example, H.B.K. superkicks Jericho - Orton tosses H.B.K. out, pins Jericho - Orton didn't win his way, but won in general)