Dragon Ball Xenoverse 2 has been around for quite a while, even existing on other consoles before coming to Switch in 2017. However, despite its age and the existence of a newer Dragon Ball fighter, FigherZ, new content is still on the way.
Later this winter, Ultra DLC Pack #2 will be released for the game, and Bandai Namco has shown off a new fighter it will include: Super Uub. Uub is the human reincarnation of onetime villain Kid Buu, hence the reversed name, apparently.
In addition to this new fighter, the game will also receive updates to its Photo and Master Raid modes.
Source: Siliconera