...and that's a big IF at this point (Batista and to a lesser degree Punk have more of a chance of winning) but if he does, then here's what I think would be an interesting scenario where he wins the Rumble and breaks free of Wyatt's "spell" at the same time.
Let's say the entire Wyatt Family ends up being the final four at the Rumble. Wyatt grabs the mic and orders (or just naturally expects) that all three of them will step over the top rope and eliminate themselves so that Bray himself can be declared the winner. Rowan takes his time doing so first. Then Harper follows. But when Bray orders Bryan to then do the same, Bryan stands there for a moment contemplating whether he should or not and the fans begin chanting "NO!" extremely loud and we start to see it's having a clear effect on Bryan. He's starting to feel the positive energy of the crowd more than ever before and it eventually causes him to snap out of it and attack Wyatt. Rowan and Harper climb back into the ring to help Bray but Bryan fights them off and ends up eliminating Wyatt to win the match.
While some may feel this might be a bit too early to separate Bryan from Wyatt, I disagree. I think this would be the perfect chance to do it but only if Bryan wins. What better chance to break away from them than when you're one elimination away from winning the Rumble and getting a title shot at Wrestlemania? I do have a couple of slightly different ways on how it could play out but I like this one the best. Either way, this all leads to Bryan/Wyatt at Elimination Chamber so that he can wrap up this whole feud before the build to Mania starts.