This arc in a nutshell:
It depends on what Kubo does. I think it is noteworthy that now all the Shinigami are free to charge at him. Maybe everyone will give Ichigo power similar to how Kill la Kill ended. Maybe Aizen's Bankai can trick Yhwach's ability. Maybe the Soul King did something before his "death" to ensure Ichigo becomes the Soul King.
All I know is that Rukia showed up in the last episode and since she is the best character that means nothing but good news.