Teaming with Edge would be an obvious one, as would a feud with Edge. There's also the possibility of a return for Tomko, which could also be pretty awesome.
However I'd just like him to debut at the Royal Rumble and have him as a surprise entrant, because I think if they had the 'CHRISTIAN Opera Theme' blast out at the Rumble then I for one would mark out like I haven't done in years!!