Suggestions by @nathanholmes

John Boyega

as Cyborg in Justice League (Phase 3: Movie 9)

Lucas Till

as Flash in Justice League (Phase 3: Movie 9)

Idris Elba

as John Stewart in Justice League (Phase 3: Movie 9)

James Marsden

as Hal Jordan in Justice League (Phase 3: Movie 9)

Timothée Chalamet

as Tempest in Justice League (Phase 3: Movie 9)

Emilia Clarke

as Mera in Justice League (Phase 3: Movie 9)

Jason Momoa

as Aquaman in Justice League (Phase 3: Movie 9)

Gal Gadot

as Wonder Woman in Justice League (Phase 3: Movie 9)

Chloë Grace Moretz

as Supergirl in Justice League (Phase 3: Movie 9)

Mechad Brooks

as Steel in Justice League (Phase 3: Movie 9)

Joshua Orpin

as Superboy in Justice League (Phase 3: Movie 9)

Alison Brie

as Lois Lane in Justice League (Phase 3: Movie 9)

Jon Hamm

as Batman in Justice League (Phase 3: Movie 9)

Henry Cavill

as Superman in Justice League (Phase 3: Movie 9)

Boyd Holbrook

as Grifter in Flashpoint (Phase 3: Movie 8)

Andy Muschietti

as Andrés Muschietti in Flashpoint (Phase 3: Movie 8)

Jon Hamm

as Bruce Wayne in Flashpoint (Phase 3: Movie 8)

Lauren Cohan

as The Joker in Flashpoint (Phase 3: Movie 8)

James Marsden

as Hal Jordan in Flashpoint (Phase 3: Movie 8)

John Wesley Shipp

as Henry Allen in Flashpoint (Phase 3: Movie 8)