User blog comment:Xilinoc/Ch. 541 - THE BLADE AND ME 2/@comment-7924893-20130612200535/@comment-10630156-20130615112318

I also have a theory that Mayuri knows more about Yhwach's defeat than has already been stated as he seems to have something personal against him. When he has talked about Yhwach so far he has never said his name only called him "that man" which is blunt to say the least + his experimenting on Quincys in the past.

Was he expecting this the whole time? Yes, well at the least since the time when he fought Uryu, and remember how depressed Mayuri was then after fighting Uryu? How much does he actually know?

What could it be that could make him so emotional like when he yelled at Yamamoto and get depressed after he fought Uryu? I for one would certainly would like to know why the usually emotionally stable (though mad) Mayuri lost it like that

Thirdly if it was something that Yhwach did to Mayuri 1000 years ago what could it possibly be that could still give him enough balls to yell at yamamoto 1000 years later let alone become melancholic when Uryu appeared?

Kubo could be planning to answer all our questions through a flashback to Mayuri's past prior to the Maggots Nest