Directed by Lauren Montgomery and Sam Liu and written by Dwayne McDuffie, this is based on Grant Morrison’s JLA: Earth 2 and takes place between Superman/Batman: Public Enemies and Batman: Under the Red Hood.
On Earth-3, Lex Luthor (Chris Noth) is a hero, working with the Jester (James Patrick Stuart) to stop the Crime Syndicate. He escapes to our Earth and informs the Justice League of his plan to stop them from being the rulers of his planet.
Nearly every member of the Crime Syndicate has a duplicate on Earth-1. Superwoman (Gina Torres) is Superman (Mark Harmon). Owlman (James Woods) is Batman (William Baldwin). Wonder Woman (Vanessa Marshall) is Ultraman (Brian Bloom). Power Ring is Green Lantern (both played by Nolan North), while Johnny Quick (James Patrick Stuart) is The Flash (Josh Keaton). The other Earth is so warped that instead of Deathstroke being a killer, he’s President Slade Wilson (Bruce Davison) and his daughter Rose (Freddi Rogers) somehow doesn’t become a mercenary, but instead one of the few good people on her world, falling in love with Martian Manhunter (Jonathan Adams).
Where the movie simplifies things is the revelation by Morrison that Luthor, no matter the world, is fated to lose while the Justice League will always win. When they switch worlds, this ruins the balance of this predestiny. That said, for a cartoon that has to make a quick version of this story, it’s pretty good. I loved how the Made Men show up, people given powers by the Crime Syndicate as almost mob henchmen, as well as getting to see Firestorm, Black Lightning, Black Canary and alternate versions of the Marvels, Vibe and Looker.
You can watch this on Tubi.