User blog comment:Insistente/Ichigo also survived Auswählen like Uryu/@comment-12511635-20130730193624/@comment-11051098-20130801045902

In a chapter after he arrived in SS, Ichigo thought about it and I'm sure the words said that he felt like he was "summoned" to Yhwach's location. Maybe it was because his Quincy powers had awakened, I don't know.

Since the beginning, the Quincies were unable to steal his Bankai. I think the reason is that the old Asauchi-less Zangetsu might have been materialized by his Quincy powers, as someone theorized before. I find the theory interesting and possible.

In the beginning, when he got half of Rukia's reiryoku and for some reason took all of it, his dormant Quincy powers might have materialized a spirit weapon, and it turned into a Zanpakutô form due to Rukia's Shinigami reiryoku. Then again, when he was trained by Urahara and awakened his own Shinigami powers, the dormant Quincy powers could have materialized a spirit weapon which took the shape and functions of a Zanpakutô, this time due to his own Shinigami powers.

His Shinigami powers are partly based on a Hollow, and because of that, I think that the new Zangetsu will also be unable to be stolen. His Quincy powers seem to have become a part of it, in the shape of the short blade, and due to that, I also think Yhwach might be unable to steal his Quincy powers even if he should want to.

But the last part stands only on a "maybe", and all of this is only a theory.