Suggestions by @spence

Shamier Anderson

as John Stuart in DCU

Score: +1

Liza Soberano

as Donna Troy in DCU

Score: +2

Sofia Wylie

as Starfire in DCU

Score: +2

Mahershala Ali

as Martian Manhunter in DCU

Score: -3

Alden Ehrenreich

as Hal Jordan in DCU

Score: -1

Samara Weaving

as The White Queen in X-Men live action reboot

Score: 0

Haley Lu Richardson

as Rogue in X-Men live action reboot

Score: +1

Jodie Turner-Smith

as Ororo Monroe in Black Panther: Doomed Nation

Score: +1

Samara Weaving

as Black Cat in Avengers Secret Wars

Score: +3

Noah Segan

as Adam Strange in DCU

Score: 0

Noah Segan

as Adam Strange in DC CINEMATIC UNIVERSE REBOOTED

Score: +1

Noah Segan

as Adam Strange in Gunn's DCU

Score: 0

Noah Segan

as Adam Strange in DCU (Gunnverse)

Score: +1

Noah Segan

as Adam Strange in James Gunn's DC Cinematic Universe

Score: -1

Noah Segan

as Adam Strange in DC Superheroes & Villains (Live-Action)

Score: +1

Ever Anderson

as Raven in James Gunn’s Justice League

Score: +1

Noah Segan

as Adam Strange in James Gunn’s Justice League

Score: +1

Jeffrey Dean Morgan

as Deathstroke in James Gunn’s Justice League

Score: 0

Samara Weaving

as Black Canary in James Gunn’s Justice League

Score: +1

Keanu Reeves

as Vandal Savage in James Gunn’s Justice League

Score: +2