Feature-length animated adventure set in a Lego version of Gotham City. When Lex Luthor (voice of Clancy Brown) struggles to gain public support during his presidential campaign he decides to team up with the Joker (Christopher Corey Smith), who can produce a special gas that will sway public opinion. After Luthor helps the Joker escape from Arkham Asylum, the pair plan to defeat Batman (Troy Baker) and Superman (Travis Willingham) and bring down Gotham City. The rest of the Justice League join forces with the two superheroes as they fight to save the city.