While Grimmjow proceeds to fight with Kenpachi, Aizen is busy executing his plan from the Central 46 Building.
Central 46 officials, call the remaining Shinigami of the Gotei 13 here, we need to exile them for their treason. The only exception to this is Zaraki Kenpachi, he will die by Grimmjow's hand.
The Central 46 then sends summoning orders to all Gotei 13 Shinigami.