User blog comment:Godisme/The Extinction/@comment-5147109-20121002181724

Here are a few thoughts I have:

1. Ichigo's restored power still hasn't fully come to light, I believe that he has powers that will start to surface down the line, he always gets a massive power boost either from his inner hollow or Zangetsu when his life or the lives of his friends are threatened.

2. Urahara or Mayuri might be able to reverse the affect of the medallions, if he can do that and get the captains their bankai's back then they might have a shot.

3. Bear with me on this one, Shunsui and Ukitake, think about it, we have no idea what Shunsui's bankai is, and Ukitake's specialty is turning an enemy's own power back on them, I know this is an extremely long shot but they may stand a chance if teamed up.

4. Uryu, he has been absent for almost the entire story arc, he might have been training with his father to unlock new quincy abilities, for example, what if he came up and used Sklaverei on Juhabach, then it's game over for him. Admittedly too anticlimactic.

5. There is still the Royal Guard and the Spirit King, they have barely been mentioned at all and who knows what kind of power they might possess.

These are all my thoughts on this, but in the end I think it would have to be a concentrated effort, this is the final story arc of Bleach, I would imagine Tite Kubo will pull out all the stops and most likely have all the strongest elements of Soul Society, Hueco Mundo, and the world of the living come together to take on this final enemy.