They like doing the "loser joins enemy" gimmick. They did it with Scott Steiner and Test, John Morrison and Ted Jr., CM Punk and Rey, and Cena and The Nexus. They could do Bray vs. Kane at SummerSlam w/ a losing Kane joining the Family. Or the Wyatt's could just simply kidnap Kane and brainwash him. I'd prefer that, actually.
Daniel Bryan having to try and save his estranged friend would be pretty epic.