Suggestions by @theonewithda_gun

Yahya Abdul-Mateen II

as Kars in JoJo’s Bizarre Adventure, but with an all black cast

Eiyuu

as Ending Theme Song in MyCast: Attack on Space Beasts (Anime Movie)

Production I.G

as Animation Studio in MyCast: Attack on Space Beasts (Anime Movie)

Kenji Kawai

as Composer in MyCast: Attack on Space Beasts (Anime Movie)

Tobey Maguire

as Enzomaroni in MyCast: Persona Mayhem

Yoko Hikasa

as Sleepspell in MyCast: Attack on Space Beasts (Anime Movie)

Jim Carrey

as Light Yagami in Worst Live-Action Anime Movie Ever

Mark Ruffalo

as Nathan Bates in MyCast: Persona Mayhem

Lili Reinhart

as Sleepspell in MyCast: Persona Mayhem

Mega Flash

as Mega Flash in MyCast: Attack on Space Beasts (Anime Movie)

Banpira

as Banpira in MyCast: Attack on Space Beasts (Anime Movie)

Grantella

as Grantella in MyCast: Attack on Space Beasts (Anime Movie)

Gorgolem

as Gorgolem in MyCast: Attack on Space Beasts (Anime Movie)

Arakunia

as Arachnea in MyCast: Attack on Space Beasts (Anime Movie)

Nosferu

as Nosfer in MyCast: Attack on Space Beasts (Anime Movie)

Lafleya

as Lafleya in MyCast: Attack on Space Beasts (Anime Movie)

Galberos

as Galberos in MyCast: Attack on Space Beasts (Anime Movie)

Bugbuzun

as Bugbuzun in MyCast: Attack on Space Beasts (Anime Movie)

Beesectar

as Beesectar in MyCast: Attack on Space Beasts (Anime Movie)

Pedoleon

as Pedoleon in MyCast: Attack on Space Beasts (Anime Movie)