User blog comment:Xilinoc/Ch. 683 - The Dark Side of Two World Ends/@comment-4080775-20160727005940/@comment-25359524-20160727015000

There's no way he didn't saw a future where he could surpass Aizen's illusions. He can see every possible future and also change them at will. Also, when The Almighty is activated, "any power of which he "knows" will become his ally. That power will not only be unable to defeat him, but become unable to harm him in any way". If he already knows about Kyouka Suigetsu, then it is useless against him. Even so, as Yhwach can just change any future at will, I don't see where Aizen's illusions matter in any way.