User blog comment:Xilinoc/Ch. 680 - THE END 2/@comment-25383931-20160630154739/@comment-11293956-20160701074054

There's actually logic to that reasoning though. Yhwach was able to use The Almighty to beat someone as powefull as Ichibei so chances are he could use it to beat Aizen. Regardless of what Aizen's bankai wouldve done, Yhwach would've just used The Almighty to look at every posible future to see how it worked and fought using that info