Suggestions by @kingkaka

Michael Fassbender

as Reverse Flash in Justice League vs The Legion of Doom

Score: +2

Kristen Wiig

as Cheetah in Justice League vs The Legion of Doom

Score: +3

Joaquin Phoenix

as The Joker in Justice League vs The Legion of Doom

Score: +2

Jason Isaacs

as Lex Luthor in Justice League vs The Legion of Doom

Score: +2

Channing Tatum

as Shazam in Justice League vs The Legion of Doom

Score: -2

Alexander Skarsgård

as Aquaman in Justice League vs The Legion of Doom

Score: +3

Ray Fisher

as Cyborg in Justice League vs The Legion of Doom

Score: +2

Armie Hammer

as Green Lantern in Justice League vs The Legion of Doom

Score: +1

Lucas Till

as The Flash in Justice League vs The Legion of Doom

Score: +1

Gal Gadot

as Wonder Woman in Justice League vs The Legion of Doom

Score: +2

Robert Pattinson

as Batman in Justice League vs The Legion of Doom

Score: +2

Henry Cavill

as Superman in Justice League vs The Legion of Doom

Score: +2

LaKeith Stanfield

as Firefly in The Batman

Score: +1

Idris Elba

as Deadshot in The Batman

Score: +1

Jeffrey Wright

as Commissioner Gordon in The Batman

Score: +1

David Tennant

as The Riddler in The Batman

Score: +1

Joe Manganiello

as Deathstroke in The Batman

Score: +1

Charles Dance

as Alfred Pennyworth in The Batman

Score: +1

Walton Goggins

as Black Mask in The Batman

Score: +2

Colin Farrell

as Deadshot in The Batman

Score: +1