Suggestions by @joker

Cassandra Jean Amell

as Nora Fries in Batman (Arrowverse)

BD Wong

as Hugo Strange in Batman (Arrowverse)

David Harbour

as James Gordon in Batman (Arrowverse)

Lili Reinhart

as Stephanie Brown in Batman (Arrowverse)

Mateus Ward

as Jason Todd in Batman (Arrowverse)

Michael C. Hall

as Thomas Elliot in Batman (Arrowverse)

Liev Schreiber

as Harvey Dent in Batman (Arrowverse)

Andrew Lincoln

as Harvey Dent in Batman (Arrowverse)

Ryan Potter

as Tim Drake in Batman (Arrowverse)

Frank Grillo

as Roman Sionis in Birds Of Prey

Ben Affleck

as Bruce Wayne in Birds Of Prey

Jared Leto

as The Joker in Birds Of Prey

Ryan Reynolds

as Oliver Queen in Birds Of Prey

Ryan Reynolds

as Green Arrow in Justice League

Michael Fassbender

as Lex Luthor in Justice League

Charlie Cox

as Bruce Wayne in Batman (Arrowverse)

Jensen Ackles

as Bruce Wayne in Batman (Arrowverse)

Jared Padalecki

as Dick Grayson in Batman (Arrowverse)

Dylan O'Brien

as Dick Grayson in Batman (Arrowverse)

Ross Lynch

as Dick Grayson in Batman (Arrowverse)