Suggestions by @jonahross

Naomi Scott

as Talia al Ghul in The Justice League Unlimited

David Strathairn

as Martin Stein in The Justice League Unlimited

Josh Lawson

as Captain Boomerang in The Justice League Unlimited

Avantika

as Starfire in The Justice League Unlimited

Viola Davis

as Amanda Waller in The Justice League Unlimited

Michael Rooker

as General Wade Eiling in The Justice League Unlimited

María Gabriela de Faría

as The Engineer in The Justice League Unlimited

Callina Liang

as Jayna in The Justice League Unlimited

Ross Butler

as Zan in The Justice League Unlimited

Dee Bradley Baker

as Detective Chimp in The Justice League Unlimited

O'Shea Jackson Jr.

as Orion in The Justice League Unlimited

Robin Atkin Downes

as Red Tornado in The Justice League Unlimited

Sinqua Walls

as Steel in The Justice League Unlimited

Anthony Carrigan

as Metamorpho in The Justice League Unlimited

Dave Bautista

as Wild Cat in The Justice League Unlimited

Anthony Rapp

as Alan Scott in The Justice League Unlimited

Jacob Bertrand

as Jason Todd in The Justice League Unlimited

Leo Woodall

as Steve Trevor in The Justice League Unlimited

Cheyenne Jackson

as Apollo in The Justice League Unlimited

Murray Bartlett

as Midnighter in The Justice League Unlimited