Suggestions by @s105042

Joaquin Phoenix

as Bruce Banner/Hulk (recast) in MCU Phase 1-3 (1998-2009)

Liam Neeson

as Groot in MCU Phase 1-3 (1998-2009)

Ian McShane

as Harvey Elder in Marvel Cinematic Universe

Brad Dourif

as Philip Masters in The Fantastic Four

Carey Mulligan

as Alicia Masters in The Fantastic Four

Creature Voice Effects

as The Man-Bat in I'm Batman

Arcade Fire

as The Batman in I'm Batman

Gal Gadot

as Diana Prince in I'm Batman

Sam Raimi

as Director in MCU Phase 1-3 (1998-2009)

Gore Verbinski

as Director in MCU Phase 1-3 (1998-2009)

Sam Raimi

as Director in MCU 90's (Reboot)

Joel Schumacher

as Director in MCU 90's (Reboot)

Sharon Stone

as Black Widow in MCU 90's (Reboot)

Jack O'Connell

as Nightwing in DC Extended Universe

Jeffrey Wright

as Uatu in The Avengers X

Andrew Horton

as Nightwing in DC Extended Universe

Jared Leto

as The Joker in I'm Batman

Elijah Wood

as Scarecrow in I'm Batman

Bill Nighy

as Victor Fries in I'm Batman

Adrien Brody

as Victor Fries in I'm Batman