The Dragon Ball universe(s) has been retconned because of Dragon Ball Super from the previous Dragon Ball Z and Dragon Ball GT universes by introducing the Gods of Destruction.



Dragon Ball GT,Dragon Ball Heroes, and or even Dragon Ball Xenoverse are all probably one of these known Universes within dragon ball. And we don't use the term Multiverse because of the fact that the Dragon Ballverse isn't built of Infinite Universes but instead they have finite universes.