Suggestions by @darke

Mikey Madison

as Linnya Wazzo in The Terrifics, No More

Alden Ehrenreich

as Rex Mason in The Terrifics, No More

William Jackson Harper

as Michael Holt in The Terrifics, No More

David Fincher

as Director in The Brave and The Bold

Andy Muschietti

as Director in The Brave and The Bold

Guillermo del Toro

as Director in The Brave and The Bold

Sam Raimi

as Director in The Brave and The Bold

David Corenswet

as Reed Richards in The Fantastic Four

Mike Gioulakis

as Cinematographer in Doom Patrol

Gore Verbinski

as Director in Doom Patrol

Chris Pine

as "The Red" in Doom Patrol

Terry Crews

as Flex Mentallo in Doom Patrol

Khary Payton

as Joshua Clay in Doom Patrol

Billy Magnussen

as Steve Dayton in Doom Patrol

Tony Todd

as "The Nightmare" in Doom Patrol

Luke Evans

as Larry Trainor in Doom Patrol

Thomas Haden Church

as Cliff Steele in Doom Patrol

Bella Ramsey

as Dorothy Spinner in Doom Patrol

Josh Hartnett

as Darren Jones in Doom Patrol

Alison Brie

as Rita Farr in Doom Patrol