Suggestions by @dylanswift

Andrew Garfield

as The Flash in Justice League (2000s)

Score: +1

Brandon Routh

as Superman in Justice League (2000s)

Score: +1

Christian Bale

as Batman in Justice League (2000s)

Score: +1

Willem Dafoe

as Reverse Flash in Justice League (1990s)

Score: +1

Gene Hackman

as Lex Luthor in Justice League (1990s)

Score: +1

Jack Nicholson

as The Joker in Justice League (1990s)

Score: +1

Johnny Depp

as Aquaman in Justice League (1990s)

Score: +1

Will Smith

as Cyborg in Justice League (1990s)

Score: +1

Lynda Carter

as Wonder Woman in Justice League (1990s)

Score: +1

John Wesley Shipp

as The Flash in Justice League (1990s)

Score: +1

Nicolas Cage

as Superman in Justice League (1990s)

Score: +1

Christopher Reeve

as Superman in Justice League (1990s)

Score: +1

Michael Keaton

as Batman in Justice League (1990s)

Score: +1

James Franco

as Black Mask in Batman Rogue Gallery

Score: -1

Rami Malek

as Scarecrow in Batman Rogue Gallery

Score: +2

Keanu Reeves

as Deathstroke in Batman Rogue Gallery

Score: +2

Saïd Taghmaoui

as Ra's al Ghul in Batman Rogue Gallery

Score: +1

James Franco

as Black Mask in Bat Family Trilogy

Score: +2

Brendan Fraser

as Firefly in Bat Family Trilogy

Score: +1

Steven Ogg

as Firefly in Bat Family Trilogy

Score: +2