User blog comment:Xilinoc/Ch. 557 - He Already Set His Life Aside/I Already Threw Away My Life/@comment-9096222-20131113152848/@comment-11051098-20131117210850

Kenpachi is incredibly strong to not have a Bankai. He was easily defeated by Royd earlier, but now at full power, he could probably be of good help to Ichigo in the final fight with Yhwach. Perhaps we'll see a "combo fight" with more captains helping Ichigo, like in Fake Karakura Town when Hitsugaya, Sajin and Shunsui teamed up to fight Aizen.

But that likely depends on how many captains remain capable of fighting when the Sternritters are defeated.