Suggestions by @vincentwilliamsiii

Vandal Savage

as Vandar Adg in Justice Society I

Jason Momoa

as Vandar Adg in Justice Society I

Morena Baccarin

as Diana Prince in Justice Society I

Hawkman (Carter Hall)

as Carter Hall in Justice Society I

Doctor Mid-Nite (Charles McNider)

as Charles McNider in Justice Society I

Charlie Cox

as Charles McNider in Justice Society I

Javier Bardem

as Carter Hall in Justice Society I

The Flash (Barry Allen)

as Barry Allen in Flash II

Reverse-Flash (Eobard Thawne)

as Eobard Thawne in Flash II

Gnarrk

as Gnarrk in Titans I

Taylor Lautner

as Gnarrk in Titans I

Speedy (Roy Harper)

as Roy Harper in Titans I

Froy Gutierrez

as Roy Harper in Titans I

Kid Flash (Wally West)

as Wally West in Titans I

Fred Hechinger

as Wally West in Titans I

Omen (Lilith Clay)

as Lilith Clay in Titans I

Kristen Stewart

as Lilith Clay in Titans I

Don Hall (Dove)

as Don Hall in Titans I

Corbin Bleu

as Don Hall in Titans I

Hawk (Hank Hall)

as Hank Hall in Titans I