Suggestions by @emiliomendoza

Henry Zaga

as Kyle Rayner in Green Lantern corps

Rhys Ifans

as Alan Scott in Green Lantern corps

Dwayne Johnson

as Atrocitus in Green Lantern corps

Seann William Scott

as Guy Gardner in Green Lantern corps

Colin Ford

as Wally West in Young Justice

Dacre Montgomery

as Dick Grayson in Young Justice

Homelander

as Batman in Most Wanted Crossovers

David Harbour

as Swamp Thing in James Gunn DC Universe

Dylan Sprayberry

as Superboy in James Gunn DC Universe

Lili Reinhart

as Supergirl in James Gunn DC Universe

Luke Evans

as Sinestro in James Gunn DC Universe

Joseph Gordon-Levitt

as Atom in James Gunn DC Universe

Holt McCallany

as Harvey Bullock in James Gunn DC Universe

Jack Black

as Parasite in James Gunn DC Universe

Chris Hemsworth

as Booster Gold in James Gunn DC Universe

Ben Schwartz

as Plastic Man in James Gunn DC Universe

Benicio del Toro

as Vandal Savage in James Gunn DC Universe

David Tennant

as Riddler in James Gunn DC Universe

Javier Bardem

as Gorilla Grodd in James Gunn DC Universe

Rhys Ifans

as Alan Scott in James Gunn DC Universe