Bleach 629 see’s Bazz-B, Liltotto and Giselle all preparing to overthrow Yhwach and Jugram who betrayed them. All while Gotei 13 begin their invasion into the Quincy Palace, Ichigo and others also begin their invasion as they get closer to Yhwach and other Sternritter. On top of which Mayuri and Zaraki have somehow found themselves together after everyone else left them.
Bleach 628 focus on the arrival of Ichigo and Shunsui in different places only to realise that the Soul King Palace, including Zero Squad places, have been completely taken over by Yhwach. He now calls the new plane that he’s created Wahrwelt, or True World. It’s time for the Shinigami’s invasion to begin on this Wahrwelt created by Yhwach.