Joker vs Green Arrow
Bruce wayne has been called out of the country for important business. So, Batman requested GA look over Gotham in his stead. GA discoveres Joker has made somewhat of a 'last stand' in the city square of gotham. He's calling out Batman for a final showdown. GA answeres the call. Joker had prepped for weeks, thinking Bats would show. Since GA showed instead, who wins?