Just put the title on her already. Would be a nice coup for her to win it in her hometown too. I'd then like to see her retaining the strap against Eve at the Royal Rumble.
Kaitlyn vs AJ then would be the Divas feud going into Mania, but that match will of course be on the pre-show.
I highly doubt it will be on the Pre-Show, Kaitlyn vs AJ can be WWE's biggest Divas feud in years and I think WWE will want to keep that on the main card for WM29, with it likely being a title change even more so.