Suggestions by @optimistic_writer

Jack Golden Russell

as Writer in JSA (2037)

Steven Soderbergh

as Director in JSA (2037)

Kevin McKidd

as Doctor Fate in JSA (2037)

Eva Green

as Catwoman in Batman V (2037)

Dane DeHaan

as Anarky in Batman V (2037)

Eric Bana

as Hush in Batman V (2037)

Asa Butterfield

as Robin in Batman V (2037)

Ben Affleck

as Batman in Batman V (2037)

Jim Uhls

as Writer in Batman V (2037)

David Fincher

as Director in Batman V (2037)

Rachel McAdams

as Lois Lane in Superman III: Remnants of Krypton (2037)

Jessica Biel

as Mercy Graves in Superman III: Remnants of Krypton (2037)

Michael C. Hall

as Lex Luthor in Superman III: Remnants of Krypton (2037)

John Malkovich

as Jax-Ur in Superman III: Remnants of Krypton (2037)

Henry Cavill

as Bizarro in Superman III: Remnants of Krypton (2037)

Tom Welling

as The Eradicator in Superman III: Remnants of Krypton (2037)

Natalie Alyn Lind

as Supergirl in Superman III: Remnants of Krypton (2037)

Henry Cavill

as Superman in Superman III: Remnants of Krypton (2037)

Matthew Vaughn

as Writer in Superman III: Remnants of Krypton (2037)

Matthew Vaughn

as Director in Superman III: Remnants of Krypton (2037)