Suggestions by @ringothedrummer

Taron Egerton

as Green Arrow in Justice League

Alfred Molina

as Nuidis Vulko in Justice League

John Boyega

as John Stewart in Justice League

Scott Eastwood

as Steve Trevor in Justice League

Gabriel Bateman

as Wally West in Justice League

Jodie Comer

as Iris West in Justice League

Charles Parnell

as Jim Gordon in Justice League

Mystic Inscho

as Robin in Justice League

Kenneth Branagh

as Alfred Pennyworth in Justice League

Dacre Montgomery

as Rick Flag in Justice League

Liev Schreiber

as Richard Flag in Justice League

Raymond Cruz

as Sam Lane in Justice League

Jon Hamm

as King Faraday in Justice League

Nikki Amuka-Bird

as Amanda Waller in Justice League

Glenn Howerton

as Glorious Godfrey in Justice League

Tom Hardy

as “The Great One” in Justice League

Spoiler

as “The Great One” in Justice League

Starro

as Starro the Conqueror in Justice League

Jacob Scipio

as Aquaman in Justice League

Logan Lerman

as Green Lantern in Justice League