I can't see how it CAN'T be Stephanie. I mean, they've spent almost a few months now since her "never back on tv" match. Knowing the WWE's history, how much longer can they go before doubling back on that promise?
Seriously, I get the feeling that the thought of not putting herself on tv is almost like a nic-fit for Stephanie. She can try to hold off as long as possible, but sooner or later she's going to break.
I'm thinking that the thing with Lita will be interference that goes awry, with Lita playing the unwilling bride going forward, and (like the other poster said) Shawn Michaels interrupting the wedding with a serenade of some Sweet Chin Music.