Board Thread:General Discussion/@comment-4161952-20130407131828/@comment-5618441-20130409024623

Will-O-Wisp wrote: They still have nothing to counter Kyoka Suigetsu. If they fought Aizen, we'd be forced to see Byakuya and Kenpachi cut down by him. I'd hate to have witnessed that. I'm sorry, I can't agree with you here.

Kenpachi was able to (practically) destroy Tosen's bankai; who's ability pretty much cancels out all senses except pain iirc. Kenpachi was still able to defeat him with these conditions. And Kyoka Suigetsu does have some noticable flaws, something the tactical/strategist captain like Byakuya might have perceived. And Senbonzakura's only weakness was only known by a few people, I doubt Aizen was one of them.

Although, I do agree Aizen would win (due to the Hyo.), Kenpachi and Byakuya would had changed the flow of the battle completely, probably extending the battle by several more chapters.