The animated TV show Justice League Unlimited premieres on Cartoon Network, expanding the Justice League animated universe with an extended roster of superheroes.
The final episode of Justice League Unlimited airs, concluding the series' story arcs and its run on Cartoon Network.
Batman proposes expanding the Justice League to include more superheroes, leading to the creation of the Justice League Unlimited with a larger roster.
The Justice League uncovers the secretive and unethical operations of Project Cadmus, threatening to expose their clandestine genetic and cloning experiments.
The Brotherhood of Evil, led by Lex Luthor, initiates a plan to control United Planets and Earth, resulting in a massive confrontation with the League.
Traditional villains form a supervillain alliance to counter the Justice League's growing influence, escalating global threats.
Clones of Superman threaten the Earth, leading to a battle that tests the League's unity and strength.
