Suggestions by @alexstockwell

David Cross

as Dr. Thaddeus venture in The venture bros

Wes Bentley

as Two-Face in Fancast Your DC Universe

Katee Sackhoff

as Samus Aran in Video Games: The Movie

Karl Urban

as Green Lantern in Flashpoint (DCEU)

Sam Rockwell

as Dr. Arthur Light in Flashpoint (DCEU)

Lena Headey

as Martha Wayne in Flashpoint (DCEU)

Matt Smith

as Reverse Flash in Flashpoint (DCEU)

Oscar Isaac

as Captain Cold in Flashpoint (DCEU)

Oscar Isaac

as Captain Cold in Fancast Your DC Universe

Aaron Taylor-Johnson

as Batman Beyond in Fancast Your DC Universe

Colin Farrell

as John Constantine in Fancast Your DC Universe

Sharlto Copley

as Sinestro Thaal in Fancast Your DC Universe

Ryan Gosling

as Green Arrow in Fancast Your DC Universe

Crispin Glover

as Mad Hatter in Fancast Your DC Universe

Leonardo DiCaprio

as Lex Luthor in Fancast Your DC Universe

Colin Hanks

as Two-Face in Fancast Your DC Universe

Toby Jones

as Penguin in Fancast Your DC Universe

Zooey Deschanel

as Zatanna in Fancast Your DC Universe

Andrew Garfield

as Robin/Nightwing in Fancast Your DC Universe

Karl Urban

as Green Lantern in Fancast Your DC Universe