Chapter nine million and six or whatever one I just read.
That (Vasto Lorde?) Hollow looks familiar, could it be Zengetsu? I'm guessing Isshin will absorb some of it's reatsu or there will be some Naruto QB style sealing in Masaki...Well, Ichigo's powerlevels should be explained soon.
>get back to your roots
I guess being just part Quincy would be too obvious for Kubo.
Also the rain. All of these significant events happen when it's raining. Zangetsu hates the rain. Loads of chapter titles mention rain. Orihime wishes to be the rain. These Shinigami seem to think bad things happen in the rain. So, what is Kubo doing here? It's clearly more than just setting atmosphere. hmmmm.