Legion of Super Heroes: Heroes of tomorrow

Legion of Super Heroes: Heroes of Tomorrow  is a 2006 animated movie based on the Legion of Super-Heroes television series. It premiered on television and was later released on home video. The movie was released to DVD on October 18, 2006 and made its television debut on Cartoon Network's Toonami block on October 22, 2006. The film take places three months after the end of the first season and features The Justice League and the Legion of doom.

Plot
In the 31st century, Both the the Fatal Five - Tharok, Persuader, Mano,  Emerald Empress and Validus- and the Legion of Super-Villains- Lightning Lord, Hunter, Esper, Tyr, Wave, and Ron-Karr. - attack the headquarters of the Legion of Super-Heroes, with the aim of capturing their time travel device. the Legionnaires try to keep them back but fail. the villains activate the device and travel  back into the 21st century. the Legion follows them to the past, where they ends up in Metropolis.

meanwhile, the Fatal Five and  Legion of Super-Villains head to  Slaughter Swamp (just outside Gotham City). where they meet the legion of doom and joins force to take down the justice league and take over the world. Else where, The legion meets up with an older Superman and the Justice League. Brainiac 5 Tells the League about the Villains and there true Plan, to destroy Earth's sun, wipe out humanity, and thus prevent the formation of the Legion.

Both The Legion and The League track down the Villains and (after a long Battle) subdue them, but fail to prevent an apocalyptic cataclysm as the Emerald Eye of Ekron  plunging into the sun. As the star cracks apart, Star Boy and green Lantern uses their Powers to reverse the fractioning. In the final scene, the Leaguers Thank The legion for all their and commemorate Their heroism and with that The legion Returns to the Future.

Justice League
Superman: Team leader, voiced by Yuri Lowenthal

Batman: voiced by Rino Romano

Wonder Woman: voiced by Grey DeLisle.

The Flash: voiced by Charlie Schlatter

Green Lantern: voiced by Josh Keaton

Aquaman: voiced by Max Mittelman.

Martian Manhunter: voiced by Crispin Freeman.

Green Arrow: voiced by Will Friedle.

Black Canary: voiced by Kari Wahlgren.

Hawkman: voiced by Travis Willingham.

Black Lightning: voiced by Bumper Robinson.

The Atom: voiced by Jason Marsden.

Red Tornado: voiced by Liam O'Brien.

Shazam:  voiced by Sean Astin.

Plastic Man: voiced by Dana Snyder.

Captain Atom: voiced by George Eads

Vixen: voiced by Jasika Nicole.

Zatanna: voiced by Lacey Chabert

Mister Terrific: voiced by Hannibal Buress.

Firestorm: voiced by P. J. Byrne.

Legion of Super Heroes
Cosmic Boy: voiced by Wil Wheaton.

Saturn Girl: voiced by Kari Wahlgren.

Lightning Lad: voiced by Andy Milder.

Bouncing Boy: voiced by Michael Cornacchia.

Triplicate Girl:  voiced by Kari Wahlgren.

Brainiac 5: voiced by Adam Wylie.

Phantom Girl: voiced by Heather Hogan.

Colossal Boy: voiced by Adam Wylie.

Blok: voiced by Ty Olsson

Dream Girl: voiced by Tara Platt.

Element Lad: voiced by Kirby Morrow

Shrinking Violet: voiced by Kari Wahlgren

Sun Boy: voiced by Sam Vincent

Tyroc: voiced by Khary Payton

Timber Wolf: voiced by Shawn Harrison.

Star Boy: voiced by Bumper Robinson.

Matter-Eater Lad: voiced by Alexander Polinsky.

Ultra Boy:  voiced by James Arnold Taylor.

Invisible Kid: voiced by Doron Bell Jr.

Polar Boy: voiced by Mark Hildreth

Legion of Doom
Lex Luthor: voiced by Will Friedle.

Joker: voiced by John Kassir.

Cheetah: voiced by Cree Summer.

Captain Cold: voiced by Steven Blum.

Sinestro: voiced by Darin de Paul.

Solomon Grundy:  voiced by Fred Tatasciore.

Gorilla Grodd: voiced by Travis Willingham.

Toyman: voiced by Tom Gibis.

Black Manta: voiced by Kevin Michael Richardson.

Black Adam: voiced by John DiMaggio.

Bizarro: voiced by Michael Donovan.

Brainiac: voiced by Corey Burton.

Deathstroke: voiced by John DiMaggio.

Giganta:  voiced by Lana Lesley.

Scarecrow: voiced by Brian T. Delaney.

Felix Faust: voiced by Brian Jepson.

Reverse-Flash: voiced by John Wesley Shipp.

Metallo: voiced by Lex Lang.

Poison Ivy: voiced by Jennifer Hale

Major Force: voiced by Alexander Brandon.

Fatal Five
Emerald Empress: voiced by Jennifer Hale

Mano

Persuader: voiced by David Sobolov

Tharok: voiced by David Lodge.

Validus

Legion of Super Villains
Lightning Lord: voiced by James Arnold Taylor.

Esper: voiced by Tara Strong.

Hunter: voiced by Khary Payton in a thick Australian accent.

Ron-Karr: voiced by Shawn Harrison.

Wave

Tyr:  voiced by Khary Payton.