Combo Devils is a platform fighter that was just announced from indie developer Punkzilla! It includes rollback netcode and a rogue-like co-op mode for up to 4 players. Details forthcoming over the next months.

Trailer: https://www.youtube.com/watch?v=TWTAqbmIDUs

Combo Devils on FAB: http://www.fightabase.com/gamesMain.aspx?id=1453