Byakuya and Renji, the 6th Division Returns

The zanpakutos, having been released from their brainwashing with Kurotsuchi's help, fight the arriving Menos Grandes, but more come from a hole in the sky. Byakuya manages to seal the hole with spiritual energy from all the other Soul Reapers. Despite their efforts, Ichigo remains trapped inside the dome, which continues growing larger.