Bleach, though? Or well, it's one of my reasons anyway that Kubo leaves stuff open like that so it's never quite set in stone how things will turn out until he show us. Bleach as a title can't be interpreted though, because he has said that it's a reference to a Nirvana song/album/whatever. Kubo is supposedly a big Nirvana fan.
Also, I want to emphasize that it is not that I necessarily disagree with that the title of this arc is named after Ginjo, but rather those who've made claims that this arc cannot be about Isshin or tie to Isshin.