User blog comment:Xilinoc/Ch. 606 - DIVINE DIVISION/@comment-25247258-20141121042539

Fear not Xil, assuming that Yhwach follows established rules he can't use his Volstandig until he no longer has Yama's Bankai (and I'm assuming he still does). Kubo probably won't remove the Bankai until before Yhwach fights Ichigo (most likely by way of Ichibei and his knowledge of names, or Nimaiya with his knowledge of how Zanpakutos work)