By old school, you mean gray gloves? If so, I'd be all about that. Especially if he has only one last match in him. Huge nostalgic markout if he did.
I'm calling it. Cena calls him out, badass taker comes out, we get a three minute staredown. No one says anything. Fans will eat it up. Taker kicks him in the dick, chokeslam, adios.