Well, apparently the rumors are true. Its appears that the stage builder and home run modes are being added to Super Smash Bros. Ultimate on Nintendo Switch. Last month, several data miners found files that made reference to the new stage builder and home run modes. Today, a new Smash Bros. commercial has been revealed. You can watch the video below. At the beginning of the video, you can see a quick glimpse of the “Stage Builder” option on the game’s menu.
This likely means the the next major Super Smash Bros. Ultimate update (Update 3.0) will feature the two new modes as well as the ability to play as Joker from Persona 5.