Suggestions by @kenobi77

James Gunn

as Director in Superman 2: House Of El

James Gunn

as Director in The Flash 3: Flashpoint

James Gunn

as Director in The Atom

James Gunn

as Director in Superman 3: Public Enemy

Nicholas Hoult

as Lex Luthor (Earth 1) in Justice League: Amerika

Sam Witwer

as Bizarro in Superman 3: Public Enemy

Sean Gunn

as Maxwell Lord in Superman 3: Public Enemy

Katee Sackhoff

as Mercy Graves in Superman 3: Public Enemy

Skeet Ulrich

as Deadshot/Floyd Lawton in Superman 3: Public Enemy

Lashana Lynch

as Queen Bee in Superman 3: Public Enemy

Milly Alcock

as Supergirl/Kara Kent in Superman 3: Public Enemy

Ben McKenzie

as John Corben in Superman 2: House Of El

Skyler Gisondo

as Jimmy Olsen in Superman 3: Public Enemy

Wendell Pierce

as Perry White in Superman 3: Public Enemy

Bruce Campbell

as Wade Eiling in Superman 3: Public Enemy

Henry Cavill

as Captain Atom/Nathaniel Adam in Superman 3: Public Enemy

James Marsden

as The Atom/Ray Palmer in Superman 3: Public Enemy

Alan Ritchson

as Major Force in Superman 3: Public Enemy

Rachel Brosnahan

as Lois Lane in Superman 3: Public Enemy

David Giuntoli

as Batman/Bruce Wayne in Superman 3: Public Enemy