Suggestions by @vincentwilliamsiii

John Krasinski

as Kal-El/Clark Kent in Task Force X I

Morena Baccarin

as Diana Prince in Task Force X I

David Ayer

as Director in Deathstroke I

Michael C. Hall

as Alexander Fairchild in Deathstroke I

Reed Morano

as Director in Task Force X I

Jennifer Lawrence

as Dinah Laurel Drake in Task Force X I

Tom Cruise

as Henry Lee Jordan in Lantern Corps Series S1

Kyle Chandler

as Martin Harold Jordan in Lantern Corps Series S1

Iris West

as Iris West in Flash I

The Flash

as Barry Allen in Flash I

Black Manta (David Hyde)

as David Hyde in Aquaman I

Orm Marius

as Orm Marius in Aquaman I

Nuidis Vulko

as Vulko in Aquaman I

Atlanna

as Atlanna in Aquaman I

Aquaman

as Arthur Curry in Aquaman I

Thomas "Tom" Curry

as Tom Curry in Aquaman I

Hippolyta

as Queen Hippolyta in Wonder Woman I

Circe (DC)

as Circe in Wonder Woman I

Steve Trevor

as Steve Trevor in Wonder Woman I

Wonder Woman

as Diana Prince in Wonder Woman I