He will for sure. Knowing Goku, he will even help the Guardians in their fight and save the day for the Traveller. Once the Guardians realizes how powerful he is. they will team up with him and defeat the Darkness. The Traveller will be restored and help Goku get back to his own universe. Goku is good hearted. He will see this Earth as in danger and help turn things around. There is really no reason for the Darkness and Light to team up and try to kill Goku.