Suggestions by @juniorpatty

Matt Ryan

as John Constantine in Constantine (DCCU)

Morena Baccarin

as Catwoman in DC Universe with Marvel Cinematic Universe Actors

Sean Pertwee

as Alfred Pennyworth in DC Universe with Marvel Cinematic Universe Actors

Henry Cavill

as Superman in DC Universe with Marvel Cinematic Universe Actors

Cameron Monaghan

as The Joker in DC Universe with Marvel Cinematic Universe Actors

Maggie Geha

as Poison Ivy in Batman

Sergio marrone

as Lex Luthor in Justice League

Sean Pertwee

as Alfred in Justice League

Karen Gillan

as Lois Lane in Justice League

Grant Gustin

as Flash in Justice League

Robin Lord Taylor

as The Penguin in DCEU Rebooted

Benedict Samuel

as Mad Hatter in DCEU Rebooted

Keanu Reeves

as Doctor Fate in DCEU Rebooted

Hartley Sawyer

as Plastic Man in DCEU Rebooted

Melissa Benoist

as Kara Zor-El in DCEU Rebooted

Sean Pertwee

as Alfred Pennyworth in DCEU Rebooted

Brandon Routh

as The Atom in DCEU Rebooted

David Mazouz

as Young Batman in Batman

Tom Hardy

as Talon in The Batman : City Of Owls

Scott Adkins

as Batman in The Batman : City Of Owls