The Joker came across the Lexwing in Lex Luthor's base, and was awed by its size, which was, according to him, twenty times bigger than Batman's Batwing. He assumed that it would be a hundred times as lethal. When Lex Luthor tried to kill Joker, he and Harley Quinn managed to subdue Mercy Graves and Luthor. After a new paint job coutsey of Harley, the pair fly the Lexwing over Metropolis, bringing Luthor along. Joker, in the desire to destroy everything Luthor built, started to fire missiles towards the city. Batman caught up in the Batwing and fired at the gigantic ship with little effect, and decided to break in by himself when Joker returns fire.