Justice League Unlimited (JLU) is an American animated television series that was produced by Warner Bros. Animation and aired on Cartoon Network. Featuring a wide array of superheroes from the DC Comics universe, and specifically based on the Justice League superhero team, it is a direct sequel to the previous Justice League animated series.What is a Justice League?
The Justice League is the DC Universe's most powerful and premier superhero team, a strike force comprised of the world's mightiest heroes. They act as stalwart protectors of sentient life; Earth's first line of defense against terrestrial, extra-terrestrial, inter-dimensional and supernatural threats.