well, korg's people and thor definitely fought, (i think it was vanahiem, not asgard though, but the point stands, they were invading the 9 realms and the asgardians fought them off) but there's no explanation on whether korg was even there or not. honestly, it's basically the exact same thing that happened in the comics. korg's poeple attacked earth in the comics, and i even think korg was there? then in planet hulk, hulk meets korg, then in world war hulk, korg goes to earth and i don't think either of them say a single thing to each other?