Due to the zonky matchmaking often causing disconnections, the match started without an opposing Joker team but only the Heroes. My only teammate was AFK and the Hero team decided to abuse that. I managed to get Bane activated and my teammate eventually re-spawned in this more manageable area which led to this war of attrition... They probably could have won if the Batman player thought about what to do, i.e. the explosive batarang likely would've been effective.