Thanks to Weekly Famitsu, we now know that this game will be releasing on Octobter 10th 2019, at least in Japan. Over there it is known as Downtown Rantou Koushinkyoku Mach!!, and is a enhanced version of River City Melee: Battle Royal Special.
While its not confirmed whether River City Melee Mach!! will be heading over to the west, it has apparently already been rated in Korea under its English title. We will be sure to bring more updates on the game as they come.
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