Suggestions by @joeunexotic

John Cena

as Captain Marvel in Justice League

John Boyega

as Jon Stewart in Justice League

Dan Stevens

as John Constantine in Justice League

Sofia Boutella

as Diana Prince in Justice League

Mia Goth

as Harley Quinn in Justice League

Joe Keery

as Wally West in Justice League

Lance Reddick

as J'onn J'onzz in Justice League

Bill Hader

as The Joker in Justice League

James Ransone

as The Joker in Justice League

Diego Calva

as Arthur Curry in Justice League

Jack Quaid

as Wally West in Justice League

Richard Armitage

as Bruce Wayne in Justice League

Damian Lewis

as Lex Luthor in Justice League

Kelvin Harrison Jr.

as Victor Stone in Justice League

Aaron Taylor-Johnson

as Clark Kent in Justice League

Christopher McQuarrie

as Director in Justice League

Jeremy Allen White

as The Flash in James Gunn's DC Cinematic Universe

Rosario Dawson

as Wonder Woman in James Gunn's DC Cinematic Universe

Aaron Taylor-Johnson

as Superman in James Gunn's DC Cinematic Universe

Chris Hemsworth

as Basil Carlo in The Batman Universe