Suggestions by @avp_goat

Sharlto Copley

as Black Mask in Batman: Underworld

Pedro Pascal

as Lieutenant Gordon in Batman: Underworld

Mandy Moore

as Nora Allen in Flash: Origins

Henry Thomas

as Henry Allen in Flash: Origins

Elizabeth Lail

as Black Canary in Green Arrow: Emerald Archer

Loyd Bateman

as Choreographer in Superman: Truth

Matt Bomer

as Ray Palmer in Flash: Origins

Dylan Playfair

as Booster Gold in Green Arrow: Emerald Archer

Mike Faist

as The Flash in Flash: Origins

Michael Giacchino

as Composer in Flash: Origins

The Wachowskis

as Writer in Flash: Origins

Edgar Wright

as Director in Flash: Origins

Patrick Schwarzenegger

as “Whatever you say, Hal” in Flash: Origins

Spoiler

as “Whatever you say, Hal” in Flash: Origins

Khary Payton

as Silas Stone in Flash: Origins

Josh Lawson

as Captain Boomerang in Flash: Origins

Josh Helman

as Heatwave in Flash: Origins

Parker Bates

as Wally West in Flash: Origins

Jordan Patrick Smith

as John Corben in Superman: Truth

Ed Skrein

as Captain Cold in Flash: Origins