User blog comment:Xilinoc/Ch. 669 - 刃 II/@comment-24769684-20160407150816

I will not care for this chapter until these get explained: Basically, well, everything. Don't get me wrong, I didn't want an info dunno this chapter. But nothing that's happened so far has changed my opinion on this turn of events.
 * What Yachiru is
 * How Kenpachi learned Bankai instantly

Kenpachi's Bankai feels like the most shoehorned power in this arc. He's appeared so few times since he unleashed his Shikai, which actually had proper development going into it, that there doesn't seem to be ANY catalyst for this other than the fact that Kenpachi's gotten rekt by the two Schutzstaffel he's met so far. And it's not like he actually put time or thought into wanting his power to increase until Yachiru suddenly appeared and gave him power that as far as we know CAN'T BE LEARNED IN A DAY. I pray that Kubo knows what he is doing and has a coherent plan for all this. I hope that I can look at this when it's done and chuckle, thinking to myself that Kubo really did pull this power boost off and I shouldn't have doubted him. But with chicken Lille in recent memory and what we have currently...I really can't find the will to enjoy this.

Kenpachi's Bankai was kind of meh, didn't really stand out with the exception of that one face shot. Also, I think/hope the angel wings Gerard sprouted were because of the Miracle and not Vollstandig since that would be a hella lame Vollstandig.