Suggestions by @johnhomer

Adam Driver

as Scarecrow in Batman

Score: +1

Jodie Comer

as Harley Quinn in Batman

Score: +1

Josh Brolin

as Batman (Flashpoint) in Batman

Score: +1

Billy Bob Thornton

as Hugo Strange in Batman

Score: +1

Michael Fassbender

as Two-Face in Batman

Score: +1

Kaya Scodelario

as Poison Ivy in Batman

Score: +1

Naomie Harris

as Catwoman in Batman

Score: 0

John Slattery

as James Gordon in Batman

Score: +1

David Tennant

as Riddler in Batman

Score: +1

Benicio del Toro

as Bane in Batman

Score: +1

Alfred Molina

as Penguin in Batman

Score: +1

Dave Bautista

as Killer Croc in Batman

Score: +1

Ghassan Massoud

as Ra's Al Ghul in Batman

Score: +1

Finn Wittrock

as Nightwing in Batman

Score: +1

Willem Dafoe

as The Joker in Batman

Score: +1

Charles Dance

as Alfred Pennyworth in Batman

Score: +1

Aiden Gallagher

as Robin in Batman

Score: +1

John Hamm

as Batman in Batman

Score: +1

Will Poulter

as Jimmy Olsen in Superman

Score: 0

Ian McShane

as Brainiac in Superman

Score: +1