User blog comment:Xilinoc/Ch. 585 - The Headless Star 4/@comment-24509822-20140618112048/@comment-4207271-20140619054608

Again, my old theory about why Aizen lost his Zanpakuto. He didn't. Kyoka Suigetsu might have wanted to stay with it's master to see what would happen (C'mon, It's Aizen), so the Hogyoku might have fused them, placing it inside Aizen. This would leave Aizen with a weakened form of Complete Hypnosis, as seen with Yhwach's "time delay" from talking to him. Thoughts?