Invincible: Viltrimuites: Titans of Space

Invincible: Viltrimuites: Titans of space is a special prequel episode focusing on a original backstory of the Viltrimuites.
== Premise ==
In this special prequel film, set before the events of Season 1, the Viltrimuites evolve to expand their forces, when they become the perfect arms race, they discover their victories come at a cost.
== Cast ==
Frank Welker as Argall
Peter Cullen as Thaddeus
Helen Slater as Advance
Javier Bardem as Conquest
Jamie Lee Curtis as Thula
Stuart Allen as "Young Viltrimuite Warrior"
IronE Singleton as Lucan
Neil Patrick Harris as Kregg
Danielle Panabaker as Sandra
Zelda Williams as Anissa
Yuri Lowenthal as Submission
Laura Bailey as Lura
Phil Mlarr as Drecc
Steve Blum, Fred Tasticore, Khary Payton, Kari Walhgrin, Zehra Fazal, Grey Griffin as Additional Viltrimuite Grunts/Royal members
Steve Blum as Space Racer, Ragnarrs
Tony Todd as Battle Beast's Father
George Newbern as King Quintessa
== Development ==
After season 2 concludes in 2024, another special prequel film was ordered to be in production. It was decided on a original take on the Viltrimuites, including adding more original viltrimuite characters who may or not appear in the future seasons. The special film would run for 50 minutes, and air in early spring of 2025. Centering around the planet viltrium, an original story of how the Viltrimuites had established of how they made a perfect utopia before and after the "great purge", the film would also center around after the viltrimuites expansion, and have further expansive storylines of characters like Conquest, Thula, and Kregg, including a future villian for the future seasons.
Peter Cullen would return to voice Thaddeus who was previously seen in the second season, Javier Bardem was confirmed to voice Conquest. Frank Welker was casted to play Argall the original leader of viltrium.
Helen Slater would be playing an original character called Advance who is one of the high ranked leaders of Viltrim.
IronE Singleton, well known for playing T-Dog in the Walking Dead was casted to play Lucan. 
Around late 2024, Neil Patrick Harris, Zelda Williams and Jaime Lee Curtis were casted to play the viltrimuite antagonists: Kregg, Thula and Anissa. Robert Walker admitted they will bring some brutality towards their characters. 
In a interview of for the film, it was considered by director Jeff Allen to be more of a space 300 or Gladiator type of film while inherited traits of "Krypton" in terms of space and evolution.