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A mad supervillain moves in with his childhood friend as he tries to take over the world while trying to convince Daphne to join him in villainy or at least turn her to the dark side.
- Milo Stein/Dr. Doomsday (voiced by Milo Ventimiglia) - an over-the-top supervillain who now lives with his childhood best friend as he tries to take over the world, even if he has to deal with the TBD.
- Daphne Dickinson/Terror Gal (voiced by Mae Whitman) - a rather careless stripper who is Milo's best friend and helps him to TBD.
- Oliete/Warmongress (voiced by Lara Jill Miller) - Milo's feisty ex and a former member of the defunct villain team known as the Marauders who now tries to reconcile with him by often trying to seduce him in order to get him back forever.
- Sergei Coroff/Captain Communist (voiced by TBD) - a TBD Russian supervillain who believes in the return of the Soviet Union and is considered to be TBD.
- Princess Neptuna/Sea Bitch (voiced by Kaley Cuoco) - a TBD Atlantean princess and supervillain who TBD.
- Number 23 (voiced by [female]) - Milo's TBD top henchwoman who TBD.
- Leonard (voiced by Jim Meskimen) - a TBD bartender who is TBD.
- The Iron Hammer (voiced by Fred Tatasciore) - a Russian superhero who is considered by many to be the best hero around as he is Doomsday's arch-enemy.
- Madame Justice (voiced by [ideas]) - a heroine who TBD.
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