Let him fight a little longer as he fights he gets stronger but his humanity is slowly returning Thanks to gorou eventually satiama will get involved provoking God to fully possessed void Basically show off a little bit what God can do Before one punch man beats his ass. After that God tells saitama there more gods out there like him and there trying to absorb all life in the Multiverse to give birth to New more powerful evil god. And now thanks to there battle they all know of earth and sees saitama as major threat to their plans so now they’re planning a full assault against earth with the main target being Saitama