Suggestions by @dickcooper

Colin Firth

as Torque in Nightwing

Kat McNamara

as Tarentula in Nightwing

Lucas Till

as Nite-Wing in Nightwing

Evangeline Lilly

as Lin Beifong in Legend of Korra

Emma Myers

as Jinora in Legend of Korra

Helena Bonham Carter

as Naga in Legend of Korra

John Krasinski

as Tenzin in Legend of Korra

Sofia Carson

as Asami Sato in Legend of Korra

Curran Walters

as Bolin in Legend of Korra

Booboo Stewart

as Mako in Legend of Korra

Zendaya

as Korra in Legend of Korra

Kiersey Clemons

as Halo in Nightwing

Grant Gustin

as Geo Force in Nightwing

Jamie Chung

as Katana in Nightwing

Richard Zeppieri

as Tony Zucco in Nightwing

Emma Mackey

as Emma Kitty in Starfire

Jonathan Majors

as Monitor in Starfire

Jacob Tremblay

as Kid Flash in Starfire

Mckenna Grace

as Xs in Starfire

Miles Teller

as Superman in The Outsiders