Batman Beyond: Return of the Joker (2000)

When innocent civilians begin committing unthinkable crimes across Metropolis, Gotham City and beyond, Batman must call upon mystical counterparts to eradicate this demonic threat to the planet; enter Justice League Dark. This team of Dark Arts specialists must unravel the mystery of Earth's supernatural plague and contend with the rising, powerful villainous forces behind the siege—before it's too late for all of mankind.

The world is under attack by an alien armada led by the powerful Apokoliptian, Darkseid. A group of superheroes consisting of Superman, Batman, Wonder Woman, The Flash, Green Lantern, Cyborg, and Shazam must set aside their differences and gather together to defend Earth.

The Justice League faces a powerful new threat — the Fatal Five! Superman, Batman and Wonder Woman seek answers as the time-traveling trio of Mano, Persuader and Tharok terrorize Metropolis in search of budding Green Lantern, Jessica Cruz. With her unwilling help, they aim to free remaining Fatal Five members Emerald Empress and Validus to carry out their sinister plan. But the Justice League has also discovered an ally from another time in the peculiar Star Boy — brimming with volatile power, could he be the key to thwarting the Fatal Five? An epic battle against ultimate evil awaits!

Witness the legendary origin of renowned Justice League member Wonder Woman as she fights for good with her sword and magic lasso. Equally strong in body, heart and will, she makes it her mission to help a troubled young girl enlisted by a deadly organization known as Villainy, Inc., whose criminal members have their sights set on invading Themyscira, Wonder Woman’s paradise home. The battle will be epic, because if there's one thing an Amazon knows, it’s war!

Fuelled by remorse and vengeance, a high schooler named Terry McGinnis becomes the new Batman as he fights crime in the futuristic Neo-Gotham City.

After the events of Justice League: War, Ocean Master and Black Manta have declared a war against the surface in retaliation of the aftermath of Apokoliptian-tyrant Darkseid's planetary invasion. Queen Atlanna seeks out her other son, Ocean Master’s half-brother Arthur Curry, a half-human with aquatic powers with no knowledge of his Atlantean heritage, to restore balance. Living with powers he doesn’t understand and seeing the danger around him, Curry takes steps to embrace his destiny, joining the Justice League, and with his new teammates he battles to save Earth from total destruction.

As if the Penguin wasn't enough to contend with, a new vigilante has surfaced in Gotham City, and her strong-arm tactics give Batman cause for concern. Being the World's Greatest Detective and The Dark Knight, he sets out to uncover her identity while stopping a dangerous criminal plot.

Tara Markov is a girl who has power over earth and stone; she is also more than she seems. Is the newest Teen Titan an ally or a threat? And what are the mercenary Deathstroke's plans for the Titans?

The Flash finds himself in a war-torn alternate timeline and teams up with alternate versions of his fellow heroes to restore the timeline.

As the Joker visits Metropolis with a plan to kill Superman for Lex Luthor, Batman pursues the clown to Superman's turf.