The film features the voices of Elyes Gabel and Diane Guerrero alongside Kevin Conroy, Susan Eisenberg, and George Newbern reprising their roles as Batman, Wonder Woman, and Superman, from various DC productions.

Star Boy discovers his supply of medicine, needed to stabilize his mind, was destroyed in his rough landing, and does not exist in this era.

Ten months later, Jessica Cruz is struggling with the trauma of her near-death by a murderer who killed her friends, making her afraid to leave her apartment.

The Justice League members compare notes about these mysterious assailants and discover they are time travelers; and from one of Star Boy's ravings, Batman deduces that they are after Jessica.

When the three villains attack Jessica, Star Boy comes to her rescue, followed by Superman, Batman, Wonder Woman, Mister Terrific, and Miss Martian, who force them into flight after a hard struggle.

Upon their awakening, the League receives an ultimatum from Mano: surrender Jessica or Tharok will set off bombs across the United States.

Left behind with Star Boy in the Watchtower, Jessica is contacted by Tharok through her ring, forcing her to surrender herself to the Five and enable them entry to Oa's prison cells.

Afterwards, Emerald Empress steals the Central Power Battery's energy, and the Five return to Earth to recover the time sphere.

Emerald Empress subdues the Justice League and then initiates her master plan to use the Lantern's power to destroy the Sun, wipe out humanity, and prevent the formation of the Legion in their time.

The film features Kevin Conroy, Susan Eisenberg, and George Newbern reprising their roles as Batman, Wonder Woman, and Superman from Justice League and other DC productions.

[14] Roman Julian, writing for MovieWeb, lauded the return of the classic DCAU animation, but criticized the film's "mediocre story".