As the title says, while waiting for new chapters to come out I've
started rereading the series, and I've come up with some theories
about a few things. The first and most prominent one is about
Ichigo's bankai. In Chapter 541 we learn that "Old Man Zangetsu"
wasn't really Ichigo's zanpakuto, but rather the manifestation of
his Quincy powers. The true Zangetsu was, in fact, Hollow Ichigo.
The Old Man states that whenever he taught Ichigo about his
zanpakuto, he had him fight against Zangetsu rather than himself.
From what I've seen, this is true for all of the fights Ichigo had
with his powers except for when he learned bankai (he also fought
his Quincy powers when learning the Final Getsuga Tensho, but he
fought Zangetsu …