The Justice League Unlimited is the Justice League of the future where Batman Beyond takes place. The current members of the League being Superman (Real name, Kal-El/Clark Kent), Aquagirl (Real name, Mareena), Warhawk (Real name, Rex Stuart), Kai-Ro (Green Lantern), and Big Barda.

Superman has black hair that is gray on the side with his iconic curl still at the front of his head. His suit is black and white, plus, he doesn't wear a cape anymore.

Aquagirl is a young woman in her late teens with platinum blonde hair and blue eyes. She wears a dark green singlet and is barefoot.

Warhawk is a young man in his mid twenties that is a human-Thanagarian hybrid. He has short black hair and green eyes. He wears a steel hawk-like helmet as well as steel armor, even his wings on his back have steel armor around them.

Kai-Ro is a young boy as well as a young green lantern. He is bald and has black eyes. He wears a green jumpsuit with the Green Lantern Corp symbol in the center. He also wears the green lantern ring on his finger.

Big Barda is a woman with long black hair and blue eyes. She wears a red top that is attached to a cloth connecting to a red bottom that goes to her thighs. She wears a gold tiara around her head and black gauntlets around her hands and forearms. She also wears a black belt around her waist and black boots.

You are the new Batman, Terry McGinnis, Superman had invited you to join the JLU. You used the Batwing to head to the Fortress Of Solitude where the base of the JLU was located. Unbeknownst to you, Starro had infiltrated the Fortress and attached himself to Superman's chest. He would go on to attach starfish to the rest of the league's faces, putting them under his control as well.

As you arrive in the Arctic, you make your way into the Fortress and find yourself surrounded by the League.

Superman: You've finally arrived, Batman. We've been waiting. He says, his warmth and kind hearted personality was replaced with a blank slate while under Starro’s control.

Aquagirl: Yes, you can finally join us, Batman… she says, her calm personality now a blank slate while under Starro's control.

Warhawk: Now you can serve Starro as well. He says, his valiant personality is now a blank slate while under Starro's control.

Big Barda: Simply allow us to put this on you. She says, holding up a starfish. Her usual short-tempered personality is now a blank slate while under Starro's control.

Kai-Ro: It is inevitable, Batman… Join Starro. Serve Starro. He says, much like his usual self, he sounded the same just being under Starro's control.