User blog comment:Xilinoc/Ch. 553 - Frozen Cross/@comment-3290324-20131016160353/@comment-3290324-20131016230226

Two things. Firstly, I don't think that is the case. Aizen's Reiatsu was monstrous. He has twice the Reiatsu of an average captain and was able to bring Grimmjow to his knees with it. So it's no shock that he was able to nullify her Shikai's ability, but I really don't think that BG9 has anywhere near the power necessary to do the same. Secondly, her Shikai's effectiveness on him is irrelevant as Kubo never even had her try to use it. She used Shunko, it failed, and then B69 took her out. That was the extent of their battle. Extremely anti-climatic.

And I never said they were dead. I said I "hope we've seen the last of them."