If the Switch should find a cross-over game then, Ultimate Marvel vs Capcom 3 should be it. The Marvel games target a certain niche within the fighter genre --unlike any others. At its highest level of play, it's hard to keep track of what's going on on-screen, and that's why it's a must play.
The title is incredibly technical at its highest level and requires players to be on their toes at all times. Anything can swing the match in favor of you or your foe. You have to have the presence of mind to recognize opportunity and potential misfortune. Really, it's a game that pros and casual players can both pick up and enjoy.