User blog comment:Xilinoc/Ch. 633 - FRIEND 3/@comment-25383931-20150702112824/@comment-5398287-20150704222047

It also cut back in 331, but the flashback kept going. I'm 98% certain Kubo plans to keep going with this flashback a bit more to show the original battle between the Gotei 13 and the proto-Wandenreich, more specifically the first battle between Yamamoto and Yhwach. The set-up is all there.