I still say that Ichigo isn't strong enough to take on Yhwach.
His final fight should be against Ishida, they've got some serious issues to deal with, they either need to fight or fuck... Not sure which one would help them more.
Then the ACTUAL final fight will be between Shunsui and Yhwach. Of course if I'm getting my real wish it'd be Shunsui, Ukitake and Unohana, all going against Yhwach, dropping Bankai and then spending 5 chapters gangraping him for what he did to Yama-ji