Suggestions by @matchesmalone12

Ray Nicholson

as The Joker (cameo in post credits scene) in The Batman: Burning City

Score: +2

Cailee Spaeny

as Barbara Gordon in The Batman: Burning City

Score: +2

Finn Cole

as Guy Gardner (Cameo) in Green Lantern Corps Movie

Score: +2

Colman Domingo

as John Stewart in Green Lantern Corps Movie

Score: +2

Andrew Scott

as The Joker (cameo in post credits scene) in The Batman: Burning City

Score: +1

Caleb Landry Jones

as The Joker (cameo in post credits scene) in The Batman: Burning City

Score: +1

James Faulkner

as Galactus in The Marvels

Score: +2

Taylor John Smith

as Hal Jordan in Green Lantern Corps Movie

Score: +2

Ralph Fiennes

as Alfred Pennyworth in The Batman (2023-?)

Score: +3

Ethan Hawke

as James Gordon in The Batman (2023-?)

Score: +2

Jon Bernthal

as Slade Wilson in The Batman (2023-?)

Score: +3

Amber Midthunder

as Barbara Gordon in The Batman (2023-?)

Score: +3

Maddie Ziegler

as Barbara Gordon in The Batman (2023-?)

Score: +2

Eddie Redmayne

as Edward Nashton in The Batman (2023-?)

Score: +4

Finn Wittrock

as Harvey Dent in The Batman (2023-?)

Score: +2

Daisy Edgar-Jones

as Selina Kyle in The Batman (2023-?)

Score: -1

Aisling Franciosi

as Selina Kyle in The Batman (2023-?)

Score: -1

Jake Gyllenhaal

as Oswald "Oz" Cobblepot in Denis Villeneuve's The Batman

Score: +3

Klaus Badelt

as Composer in Superman: Legacy (2025)

Score: +3

Caleb Landry Jones

as Lex Luthor in Superman: Legacy (2025)

Score: +1