Board Thread:New on Bleach Wiki/@comment-27120311-20151025235010/@comment-26091912-20151111095456

AbhiVats wrote: Now that he truly has his true zanpakuto and has achieved full status as a Soul Reaper, it would be senseless to have him be able to hollowfy. It would then just mean that he has not achieved full strength.

By that logic, Ichigo would already be using his true power each time he hollowfied, thus defeating the whole purpose of hollowfication in the first place, which is to enhance one's abilities beyond what they would be capable of normally. That would necessarily mean that he should only be as strong as his previous hollowfied Bankai form. But from what little we've seen of his current capabilities (getting to Soul Society from the Royal Realm in just half a day, and easily overpowering 4 Sternritter simultaneously), he's a lot stronger than he was before.

Also, that statement about him being a real Shinigami is to do with how he has matured, not that he's now suddenly a 'true' Shinigami just because he has a Zanpakuto based on an Asauchi.

Though I think his is the first, and only, case in the history of the Soul Society that a Bankai has ever broken...

No, other Bankai have been broken before: Renji's old one, Ikakku's, Mayuri's and Komamura's; though he's a special case because he and his Bankai are so deeply linked, that if he gets injured and heals, the Bankai will recover also.

Anyway, we'll find out. If he can, he can. If not, doesn't matter.