https://www.gamespot.com/articles/e3-2018-super-smash-bros-ultimate-release-date-on-/1100-6459760/

Super Smash Bros. Ultimate will launch December 7 for Nintendo Switch, Nintendo announced during its E3 2018 briefing. It's one of Nintendo's biggest franchises, and the launch in December right before the holidays will surely help Switch console sales improve further still.

As announced during Nintendo's E3 briefing, Super Smash Bros. Ultimate will include every previously released character, as well as new ones like Inkling Girl and Boy and Ridley. Additionally, you can use a GameCube controller, which is pretty great, although you will need the appropriate adapter to connect it to the system.