I was thinking, and Shawn needs to kip up out of another wheelchair.
Yeah, maybe he's already had three months to heal but we all know Shawn *loves* milking injuries. Hell, maybe show him for the first time during the pre-PPV Sunday Night Heat watching (while still in a wheelchair) his own "Shawn Michaels is returning promo", with him yelling "Shit, I didn't know that!", START WHEELING HIS ASS TO OREGON, have him show up about 2 minutes late for his match with Kane about 90 minutes later and HE KIPS OUT OF THE WHEELCHAIR and the match begins.
..I'm sure they could pull it off in a believable fashion.