Here is an overview of the game, via Nintendo:
When Travis Touchdown wanders into the game world, he goes on a rampage of epic proportions. The latest title in the cult classic No More Heroes series contains a total of seven game titles, including an action game, racing game and puzzle game. By using another Joy-Con controller, two players can team up for co-op multiplayer action.
The game is due out for Switch in 2018.
Watch the footage below (from 11:45 to 12:45).