User blog comment:Xilinoc/Ch. 683 - The Dark Side of Two World Ends/@comment-4080775-20160727005940/@comment-25359524-20160728040948

And the future is not forged by what was done in the past? If he can see every possible future, then a future that is the result of an altered past can also be seen. I really don't see why you guys keep arguing that Aizen's illusions are a workaround against Yhwach's powers, when, you know, he could've seen every future where Aizen could use his illusions against him. You're also forgetting the part where everything that is once used against him can no longer harm him in any way, while also becoming his ally. And I'm not only talking about Aizen's illusions, but mainly about Getsuga Tenshou: it should be useless by now. Also, Tsukishima's thing was really dumb. He should've seen it coming. Actually, he should've killed Ichigo and everyone around there, he had nothing to lose anyway, even though I think he still have nothing to lose right now.

There's just no room for consideration, I'm being logical. For Kubo to defeat Yhwach he's going to have to contradict himself. That's what you get for creating an overpowered villain while also having almost no time left to tell your story.