Nintendo offers up about 30 minutes of a gameplay demonstration for their upcoming fighter, ARMS.
Check out the gameplay for ARMS at the Nintendo Show floor at E3 2017.

ARMS is an action-packed mix of boxing and shooting where you use extendable arms to battle your friends both locally and online! Take a Joy-Con in each hand and punch forward, twisting your fists to bend your attacks.

ARMS is due for release on June 16, 2017. That is to say, it's out in under two days from now.