The shinigami are still caught in a battle against the Espada and Sosuke Aizen. But the battle to stop the formation of the kings key has called down the Shinseina as well. The sacred Shinigami.
Even though she hasn't been all that stable since the betrayal of Aizen, she has been leading Squad 5......but seems to be still even to this day hung up on 'captain' Aizen....so much so that many fear what will happen when Momo meets back up with Aizen.