When does Justice League Unlimited return?

Justice League Unlimited debuted on July 31, 2004, on Toonami and ended on May 13, 2006. It is the eighth and final series of the DC Animated Universe, serving as the conclusion to a shared universe which began with Batman: The Animated Series. The show features a greatly expanded League, in which the characters from the original series are joined by many other superheroes from the DC Universe.