Suggestions by @mephilesthedark

Margot Robbie

as Harley Quinn in Casting James Gunn's DCU! :D

Seth Rollins

as Lobo in Casting James Gunn's DCU! :D

Roman Reigns

as Lobo in Casting James Gunn's DCU! :D

Jason Momoa

as Lobo in Casting James Gunn's DCU! :D

Keith David

as Martian Manhunter in Casting James Gunn's DCU! :D

Christopher Judge

as Martian Manhunter in Casting James Gunn's DCU! :D

Will Poulter

as Aquaman in Casting James Gunn's DCU! :D

Brock O'Hurn

as Aquaman in Casting James Gunn's DCU! :D

Melissa Barrera

as Wonder Woman in Casting James Gunn's DCU! :D

LaKeith Stanfield

as John Stewart in Casting James Gunn's DCU! :D

Wolfgang Novogratz

as Hal Jordan in Casting James Gunn's DCU! :D

Jace Norman

as Flash in Casting James Gunn's DCU! :D

Karen Fukuhara

as Talia al Ghul in Casting James Gunn's DCU! :D

Cary-Hiroyuki Tagawa

as Ra's al Ghul in Casting James Gunn's DCU! :D

Ewan McGregor

as Commissoner Gordon in Casting James Gunn's DCU! :D

Jason Isaacs

as Alfred Pennyworth in Casting James Gunn's DCU! :D

Alan Kim

as Damian Wayne (Robin) in Casting James Gunn's DCU! :D

Matthew Lillard

as The Joker in Casting James Gunn's DCU! :D

Nicolas Cage

as Jor-El in Casting James Gunn's DCU! :D

Henry Cavill

as Jor-El in Casting James Gunn's DCU! :D