Suggestions by @dsquared

Peyton Meyer

as Jimmy Olson in Superman

Score: +1

Brandon Flynn

as Guy Gardner in Justice League

Score: +1

Lola Blanc

as Faora in Justice League

Score: +1

Spencer Locke

as Mala in Justice League

Score: +1

Naomi Ackie

as Nubia in Justice League

Score: +1

Olivia Cooke

as Mera in Justice League

Score: +1

William R. Moses

as General Sam Lane in Justice League

Score: +1

William R. Moses

as General Sam Lane in Superman

Score: +1

Peyton Meyer

as Jimmy Olson in Justice League

Score: +1

Jon Hamm

as Lex Luthor in Justice League

Score: +1

Kaya Scodelario

as Lois Lane in Justice League

Score: +1

Jason Momoa

as Lobo in Justice League

Score: -1

James Purefoy

as General Zod in Justice League

Score: +1

Ian Somerhalder

as Lex Luthor in Justice League

Score: -1

Eiza González

as Wonder Woman in The Justice League

Score: +1

Alexander Ludwig

as Green Arrow in Justice League

Score: +1

Zackary Arthur

as Billy Batson in Justice League

Score: +1

Noah Centineo

as Shazam! in Justice League

Score: +1

Lance Reddick

as Martian Manhunter in Justice League

Score: +1

Scott Eastwood

as Hal Jordan in Justice League

Score: +1