Suggestions by @gcote

Anthony Starr

as Ewbart Thawne in James Gunns Injustice

Score: +1

Ezra Miller

as Barry Allen in James Gunns Injustice

Score: 0

Steve Martin

as Martin Stein in James Gunns Injustice

Score: +1

Jordan Fite

as Jason Rusch in James Gunns Injustice

Score: +1

Dwayne Johnson

as Teth Adam in James Gunns Injustice

Score: +1

Xolo Maridueña

as Jaime Reyes in James Gunns Injustice

Score: +1

Ana de Armas

as Diana Prince in James Gunns Injustice

Score: +2

David Corenswet

as Clark Kent in James Gunns Injustice

Score: +2

Jensen Ackles

as Bruce Wayne in James Gunns Injustice

Score: +2