Suggestions by @nilren

Henry Cavill

as Superman in DCEU

J.K. Simmons

as James Gordon in DCEU

Jeremy Irons

as Alfred Pennyworth in DCEU

Margot Robbie

as Harley Quinn in DCEU

Karl Urban

as Batman in DCEU

Jared Leto

as Joker in DCEU

Ben Affleck

as Batman in DCEU

Danny DeVito

as The Ringmaster in Disney Villains

Amanda Righetti

as Vickie Vale in The Batman (DCEU)

Jon Hamm

as Hush in The Batman (DCEU)

Ray Winstone

as Harvey Bullock in The Batman (DCEU)

Robert De Niro

as The Penguin in The Batman (DCEU)

Ray Winstone

as The Penguin in The Batman (DCEU)

Chris Messina

as Victor Zsasz in The Batman (DCEU)

Dave Bautista

as Bane in The Batman (DCEU)

Shailene Woodley

as Batgirl in The Batman (DCEU)

Casey Affleck

as The Riddler in The Batman (DCEU)

Léa Seydoux

as Poison Ivy in The Batman (DCEU)

Elijah Wood

as Mortimer Toynbee in X-Men

Mark Strong

as Charles Xavier in X-Men