I would also like to point out to people that 'Nozarashi' could be his release command, rather than the zanpakuto name.

In fact, considering that the release command is supposed to come BEFORE the zanpakuto name, if he's actually releasing it, then it should be the command and we'll find out the name next chapter.

Of course I acknowledge that this can be countered by the argument that it's already in perma-release form, but it is something to be aware of, nonetheless.