Battle takes place in Earth (DB-verse Earth)
All are Bloodlusted
This a joke battle
Story- Goku found out that 3 powerful dudes were after him, so he called for some help. Tho he had to offer these guys something they found amusing in order to help. So Goku gave Thanos the Black Star Dragon Balls, Namekian Dragon Balls, Earth Dragon Balls, and the Tree of might. He gave Superman a new cape and new boots. He told Bugs that Chichi would cook him 1 Billion carrots.
So the 3 accepted the offers and helped Goku.