Suggestions by @dickcooper

Carlos Valdes

as Music Meister in The Flash

Kyle Gallner

as Chillblaine in The Flash

Nicole Kidman

as Lisa Park in The Flash

Luke Evans

as John Park in The Flash

Keiynan Lonsdale

as Harry Devoy in The Flash

Steven R. McQueen

as Pied Paper in The Flash

Colin Farrell

as Brutale in Nightwing

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