I'M SO MAD.
Like legitimately infuriated. This is just as much as an *sspull when Kaguya showed up! Maybe it's just me, but there were no hints of his ever happening. If anything, I expected Ichigo, aka Jesus, to become the new Soul King.
But also it was pretty obvious Aizen was coming back. But I doubt that he'll be fighting Ichigo. Instead there's going to be this revelation backstory which reveals Aizen to be the Face Heel Turn character that was actually trying to stop this from happening all along. Queue Ichigo and Aizen fighting alongside each other.
Sigh. Just....sigh.