Goku senses a being far beyond anything he has comprehended before entering the Dragon Ball Multiverse. Feeling incapable of dealing with the threat himself, he calls upon the help of Demigra and Mira, who reluctantly agree after feeling the incredible power of this unknown entity approaching the multiverse.
Gilgamesh is entering the Dragon Ball Multiverse while in search for a planet to live on with Hakuno after leaving the Moon Cell.
Goku, Demigra, and Mira mistake this as an invasion and attack Gilgamesh.
Gilgamesh decides to only fight them in hand to hand combat for amusement. However he is using SNI to help him with his close combat skills due to his omniscience.
Fight takes place at the edge of the multiverse.