If AJ retains until WM, then he should be on one corner for the Main Event, he deserves it, he had an amazing 2016. Gave great matches, proved himself as an asset for WWE and its seems like Vince is behind him.
EXCEPT, Taker actually face Cena. This would be the only NON title match along HBK v Taker 2 and Rock vs Cena, that should close the show.
Lets face it, SD Championship, is right now, the bigger title, and with the bigger title holder.