Batman and friends must unite to stop two of the most evil men who ever lived from taking over the world. The Joker and Lex Luthor, hilarity ensuesBatman and friends must unite to stop two of the most evil men who ever lived from taking over the world. The Joker and Lex Luthor, hilarity ensuesBatman and friends must unite to stop two of the most evil men who ever lived from taking over the world. The Joker and Lex Luthor, hilarity ensues