The busiest day of Batman's life begins here, as someone breaks into Arkham Asylum, intent on hunting down everyone from the Joker to Poison Ivy. Batman must protect and recapture his biggest foes--even though he's just been outlawed by Gotham's surprising new mayor!

Four avengers are training in the combat room, Black Panther, Wasp, Tigra, and Hawkeye. As they train, Bill Foster and Ant-Man are working ona project when Wasp comes in requesting Hank to fix her stingers. Wonder Man is sifting through the fridge, bringing food up to Scarlet Witch after getting something. The robot Hank was making causes him to go crazy and he attacks them all. It takes out Jarvis. An explosion also knocks out the Avengers in the training room, as well as Scarlet Witch. The remaining Avengers go to fight this robot (called Ultron), and end up defeating it.