According to animator Bruce Timm, the series finale of Justice League, "Starcrossed", was originally planned to be the final episode of the series; however, Cartoon Network ordered the production of a successor, entitled Justice League Unlimited. Taking place shortly after its predecessor ended, it features a greatly expanded League, in which the characters from the original series—now referred to as "founding members"—are joined by many other superheroes from the DC Universe; in the first episode, well over 50 characters appear. A number of these were heroes who had made guest appearances in Justice League, but many heroes and other characters made their first animated appearances in this series. The general format of each episode is to have a small team assemble to deal with a particular situation, with a focus on both action and character interaction. This extension of the Justice League was originally planned to be explained in a planned direct-to-video feature film, but the project never materialized.