User blog comment:Xilinoc/Ch. 686 - Death & Strawberry (End of Bleach reMIX)/@comment-2243814-20160818182335/@comment-1429792-20160818184252

Regarding B, Aizen was swallowed up by Yhwach's black energy. He likely wasn't in any fit state to do anything when Yhwach was beaten and was just arrested again before he could recover.