A home version of Battle Circuit! Yeah! Never played it but heard great things and Capcom's beat-em-up formula is the best beat-em-up formula so I can assume the games I haven't played will be good.
Unfortunately some of Capcom's best beat-em-ups are licenced titles so they remain in rights limbo. Cadillacs and Dinosaurs in particular is fantastic but it never had any home release so you're stuck with MAME or somehow finding a real machine in the wild. The Punisher is also amazing but it at least got a Genesis port back in the day.