Super Smash Bros. Ultimate

Promotional art that is also used for the boxart.

Super Smash Bros. Ultimate is a video game project for the Nintendo Switch released on December 7th in 2018. It is famously considered the largest crossover in video game history due to assimilating every pre-existing character in the franchise with a myriad brand new fighters.

Trivia

The game's working title is Cross2, which is a reference to the development team using Super Smash Bros. for as a base.