Black Canary first joined the Justice League during the team expansion that followed the Thanagarian invasion of Earth. Green Arrow, also admitted to the team during that time, took notice of her and decided to stay on just to get to know her better. Eventually, Green Arrow helped Black Canary rescue Wildcat from his addiction to fighting in Roulette's Meta-Brawl arena against meta-humans. Black Canary offered to fight Wildcat on the grounds that Roulette would ban him from future participation in Meta-Brawl, which she accepted; however, Green Arrow knocked Black Canary out with a gas arrow and took her place in the ring, letting Wildcat beat him to death in order for him to see the end result of his fighting addiction. Black Canary at first cursed Green Arrow for this action as being stup