Quote from strixflash
Looks like Kubo wants to use every left over character Bleach has in this arc. And knowing the story mode of Bleach, it will take forever for Bleach to use them.
not quite true.
Grimmjow disappeared during the hueco mundo arc, even though he clearly was alive and nowhere close to fatally wounded (at least, fatally wounded in the bleach series)
Telling us where he ended up is tying up a loose end.
Quote from catandmouse
Wow, so I am wondering if Ichigo is really related to the Shibas? Judging by Kuukaku's "Even if uncle gets mad at me" I thought that maybe she was talking about Isshin. That would explain why Ichigo and Kaien look alike.
Not necessarily. In asia they call close people by aunt and uncle all the time so it may simply just be that
My all time favorite manga: https://mtmanga.tumblr.com/