Not even a good combination of wrestlers. These two don't seem like they'd have the slightest amount of chemistry working a match together and neither of them are real blockbuster draws yet, so with that in mind, I wouldn't be surprise if they 'Kennedy' the Great White and get someone to swoop in and take the Rumble contract off of him or something like that. I can see Christian returning and getting him to put up his guaranteed shot and then taking it from him so that we get Christian vs. Bryan at WM.
But like Dave said, we don't know that D-Bry will have the gold heading into the big show. Orton or Show or anyone could take it off of him for all we know, but I really hope they don't make him drop it to someone between now and then.
But at the end of the day, there's no telling what kind of things will happen between now and the Chamber and WM. A lot can change, and a lot probably will in all likelihood. It could still be a big Mania, featuring Punk/Jericho, Taker/Kane, Cena/Rock, Orton/Barrett, and whatever WHC match they throw at us (I'm assuming on a couple of these)... I look forward to seeing how things unfold in the coming months. Hopefully whatever World title match they make is worthy of being more than an opener like last year.