DOS Doomsday. If he dies once it counts as a victory for the Shinigami.
The 13 Divisions are joined by Ichigo, they get 1 week prep which includes consultation with Superman on his memories of his first fight with Doomsday. (13 Divisions & Ichigo as of the end of the Soul Society Arc).
Doomsday is transported to Sokyuko Hill where the fight takes place. The surrounding area is evacuated.
How does it go?