https://www.gamespot.com/articles/pre-ordering-dragon-ball-fighterz-on-switch-gets-y/1100-6459962/

Dragon Ball FighterZ is coming to Nintendo Switch on September 28. If you preorder the game for Switch, you'll get a free download of Dragon Ball Z: Super Butoden, one of the first Dragon Ball fighting games ever.

An obscure title for American audiences, Super Butoden released on SNES only in Japan, France, and Spain in 1993. The title features a Story mode, a one-vs-one Combat mode, and an eight player Tournament mode. Super Butoden starts with a roster of eight, but another five characters can be unlocked by completing certain in-game milestones.