The series debuted in 1996 and ran for 54 original episodes through 2000 as an extension of the DC Animated Universe focusing on Superman.
Over its run, 52 original episodes aired featuring a handful of characters carried forward from the previous shows.
In 2000 Gotham Girls was launched as a web-toon featuring some of the characters used in The New Batman Adventures but from the perspective of three female villains.
[1] The two-part episode "A Better World" featured a variation of the Crime Syndicate of America called the Justice Lords.
Unvoiced League members The antagonists for this series break down into three types based on season and story arc.
The first season had a set of episodes linked by an arc focusing on a secret government agency trying to control the Justice League.
The episode "Double Date" featured a crime lord as the primary antagonist that was a mix of two DC Comics characters.
The episode "Ultimatum" featured the Ultimen, pastiches of characters created specifically for Hana-Barbara's Super Friends series.
Adam Strange was originally supposed to appear in "Hunter's Moon", but legal rights prevented that from happening.
This resulted in Black Manta being renamed Devil Ray for the series, with the character first appearing in an episode that was intended to feature Aquaman.
Since Bruce forbids her from participating she would recreate herself as Oracle, and get in touch with Black Canary and Huntress to finish her case.
According to the featurette included in the DVD release, Alan Burnett explains they had intended to use the name "Kathy Kane" but were asked to change it by DC Comics, thanks to some morally gray actions on the part of the movie Batwoman.
Black Lightning could not appear within the shows due to DC Comics' refusal to pay royalties to his creator, Tony Isabella.
He was replaced with a villain called Steven Mandragora, whose last name was later used for the man who arranged their deaths in the comic book Huntress: Year One.
[citation needed] Blue Beetle could not appear as a member of the Justice League due to rights being tied up until 2007 because of his 1940s radio show and 1980s cartoon proposals.
[citation needed] While the production team regularly referred to the collection of villains joining forces in the final major arc of Justice League Unlimited as the "Legion of Doom",[6] DC resisted the use of the term within the show itself.
Plastic Man was stated by Dwayne McDuffie to be unusable in the show despite being mentioned as a League member by John Stewart in one episode, but he did not explain why.
[10] Bruce Timm had intended to utilize the Phantom Stranger in the DC Animated Universe, but was not allowed to do so for unknown reasons.
Green Arrow's sidekick Speedy appears in the episode "Patriot Act", which aired following the finale of Teen Titans.
Neil Gaiman once said: "I always loved the idea of doing a Sandman/Batman Animated cartoon episode, and we were definitely talking about it in '93, after Vertigo came into existence...I'd assumed that they lost interest.
But there was definitely some kind of Vertigo/DC divide that came into existence in there somewhere, imposed from DC/Vertigo editorial and above, worried, I was told, that a kid would feel pressured by continuity to pick up a 'For Mature Readers' title and the world would end.
The promo, which is viewable on the fourth disc of the Justice League Season 1 boxset, is the only appearance of Cyborgirl and Impulse in the DC Animated Universe.