Suggestions by @ringothedrummer

Aaron Paul

as Firefly in Arkham Asylum

Jesse Plemons

as Professor Pyg in Arkham Asylum

Patricia Allison

as Oracle in Arkham Asylum

Sam Rockwell

as Joker in Arkham Asylum

Zack Snyder

as Producer in Justice League: Gods and Mortals

Jonathan Pryce

as Alfred Pennyworth in Justice League: Gods and Mortals

Donald Glover

as Barry Allen in The Flash: Danger Zone

Chosen Jacobs

as Cyborg in The Flash: Danger Zone

Wyatt Oleff

as Flash in The Flash: Danger Zone

Denzel Washington

as Jonathan Kent in Superman: Public Enemy

Viola Davis

as Martha Kent in Superman: Public Enemy

Joel McHale

as Alexander Luthor in Superman: Public Enemy

Chris Pine

as Superman in Superman: Public Enemy

Florian Munteanu

as Great White Shark in Arkham Asylum

Denzel Washington

as James Gordon in Arkham Asylum

Giancarlo Esposito

as Professor Hugo Strange in Arkham Asylum

Pedro Pascal

as Black Mask in Arkham Asylum

Wagner Moura

as Bane in Arkham Asylum

Nikolaj Coster-Waldau

as Two Face in Arkham Asylum

Dante Pereira-Olson

as Bruce Wayne in Gotham