Suggestions by @joaopedro187

Trevante Rhodes

as Green Lantern 2814 2 in The New DCU

Jovan Adepo

as Mister Terrific in The New DCU

Chiwetel Ejiofor

as Martian manhunter in The New DCU

Malachi Kirby

as Martian manhunter in The New DCU

Ṣọpẹ́ Dìrísù

as Martian manhunter in The New DCU

Sierra Aylina McClain

as Iris West in The New DCU

Keke Palmer

as Iris West in The New DCU

Katherine McNamara

as Iris West in The New DCU

Lucy Boynton

as Iris West in The New DCU

Lily Collins

as Iris West in The New DCU

Emma Watson

as Iris West in The New DCU

Zoey Deutch

as Iris West in The New DCU

Dylan O'Brien

as Flash in The New DCU

Lucas Till

as Flash in The New DCU

Will Poulter

as Flash in The New DCU

Dacre Montgomery

as Flash in The New DCU

Chloe Rose Robertson

as Supergirl in The New DCU

Lizzy Greene

as Supergirl in The New DCU

Emily Alyn Lind

as Supergirl in The New DCU

Boyd Holbrook

as Booster gold in The New DCU