THQ Nordic has confirmed that it will be releaseing MX vs ATV All Out for Nintendo Switch, and that it will be available on September 1st. The game will feature Supercross, Nationals, Opencross, Waypoint and Freestyle competition, and it will have two player local multiplayer as well as eight player online multiplayer. The gameplay trailer below is not from the Switch version, but is the only one out there at the moment.
Here is the description of MX vs ATV All Out:
All Terrain, All Vehicles, All You! MX vs ATV All Out is the complete off-road racing and lifestyle experience! Find your Rider Style at your private compound, Free Ride across massive environments, and compete in the best series events!
MX vs ATV All Out was released back in 2018 for PlayStation 4, Xbox One, and PC.
Source: Press Release