User blog comment:Xilinoc/Ch. 617 - Return of the God/@comment-24531362-20150227041326

I am fairly sure that Aizen planned all of the events that have thus far occured at least as far back as Shunsui's birth, up to and including Yamamoto founding the Shino Academy. Because Aizen.

I'm also fairly sure he planned Yhwach not being able to see the Soul King as far back as the Soul King coming into existence, or at least as far back as Yhwach's birth.

Finally, Mayuri trolling the other captains yet again is definitely part of Aizen's grand design.