Suggestions by @sonictiger

Oscar Isaac

as Batman in Justice League: Gods Among Us

Josh Brolin

as Darkseid in Justice League: Something Darker

Hans Zimmer & James Newton Howard

as Composer in Justice League: Something Darker

J.J. Abrams

as Producer in Justice League: Something Darker

George Miller

as Director in Justice League: Something Darker

sonictiger

as Writer in Justice League: Something Darker

Michelle Pfeiffer

as Martha Kent in Justice League: Something Darker

Patrick Stewart

as ALFRED in Justice League: Something Darker

Adria Arjona

as Dr. Poison in Justice League: Something Darker

Mena Massoud

as Captain Cold in Justice League: Something Darker

Saoirse Ronan

as Cheetah in Justice League: Something Darker

Charlize Theron

as Hippolyta in Justice League: Something Darker

Emma Stone

as The Oracle in Justice League: Something Darker

Chiwetel Ejiofor

as Black Manta in Justice League: Something Darker

David Thewlis

as Desaad in Justice League: Something Darker

Xochitl Gomez

as Donna Troy in Justice League: Something Darker

Emilia Clarke

as Mera in Justice League: Something Darker

Millie Bobby Brown

as Carrie Kelley in Justice League: Something Darker

Jonathan Majors

as John Stewart in Justice League: Something Darker

Mahershala Ali

as Martian Manhunter in Justice League: Something Darker