In an alternate reality which was inadvertently created by The Flash during a battle with the Reverse-Flash, it was Bruce Wayne who died on that fateful night in Crime Alley. Thomas Wayne would go on to become Batman, while his wife Martha was left completely unhinged by the murder of her son. As a result, she sliced her face open and became The Joker, killed Jim Gordon, and committed suicide upon learning of Bruce's survival in another world. However, the horrified Martha didn't jump to her death because she was grief stricken about her son only being alive elsewhere. It was because Thomas inadvertently revealed to his deranged wife that the Bruce he was trying to save was the Batman of his world.