Suggestions by @ringothedrummer

James McAvoy

as Professor X/Charles Xavier in Casting Call: X-Men!

Nikolaj Coster-Waldau

as Superman in Casting Call: The Kingdom Come Movie

Harvey Keitel

as Lex Luthor in Casting Call: The Kingdom Come Movie

Bradley Cooper

as The Conductor in The Polar Express

Ari Aster

as Mister Mind in The DC Extended Universe

Bradley Cooper

as Tony Stark in The Marvel Groovyverse

Lily-Rose Depp

as Marie Antoinette in Innocent

Graham McTavish

as Darius Zackly in Attack on Titan

Dominic West

as Pastor Nick in Attack on Titan

Regina King

as Amanda Waller in Justice League: Savage

Garrett Hedlund

as Rick Flag in Justice League: Savage

Hugh Grant

as Alfred Pennyworth in Justice League: Savage

Mckenna Grace

as Supergirl in Justice League: Savage

Mason Thames

as Robin in Justice League: Savage

Jahi Di'Allo Winston

as Kid Flash in Justice League: Savage

Taron Egerton

as Hal Jordan in Justice League: Savage

Jodie Comer

as Lois Lane in Justice League: Savage

Evan Rachel Wood

as Giganta in Justice League: Savage

Alexander Skarsgård

as Deathstroke in Justice League: Savage

Kelvin Harrison Jr.

as Black Manta in Justice League: Savage