User blog comment:Xilinoc/Ch. 629 - Gate of the Sun/@comment-26091912-20150604121151

Well, so much for Uryu being designated Yhwach's successor.

Also, I've got a funny feeling that Mayuri is going turn this battle around. Think about it, he's always been two steps ahead of everyone else during this arc. He could very well be one of the Special War Powers.