You were introduced to Snapper Canal during the last Nintendo Direct. The new stage has now been added to the rotation!
Battles will take place on a river bed that's under construction. Try not to blindly rush in—it's easy to fall into the central waterway if you're not paying attention. The ground is also lower near the water, so watch out for foes with long range weapons on the platforms above. The key will be finding out how to successfully cross the water and continue the fight on the other side. There may be some snappy comebacks during these fights, so be prepared to make some snap decisions!