Suggestions by @potterwestpark

Melise

as Kimiyo Hoshi in DC's Justice League

Marque Richardson

as John Irons in DC's Justice League

Suraj Sharma

as Simon Baz in DC's Justice League

Trevante Rhodes

as John Stewart in DC's Justice League

Jon Hamm

as Carter Hall in DC's Justice League

Matt Lanter

as Arthur Curry in DC's Justice League

Laura Vandervoort

as Dinah Lance in DC's Justice League

Matt Lanter

as Arthur Curry in DC's The Green Lanterns

Iain Glen

as Batman in DC's The Green Lanterns

Adeline Rudolph

as Linda Park in The Flash

Lily Collins

as Lisa Snart in The Flash

Andrew Lincoln

as Leonard Snart in The Flash

Terry Crews

as Grodd in The Flash

KJ Apa

as Wally West in The Flash

Michael Rosenbaum

as August Heard in The Flash

Naomi Scott

as Meena Dhawan in The Flash

Holland Roden

as Iris West in The Flash

Lucas Till

as Barry Allen in The Flash

Suraj Sharma

as Simon Baz in DC's The Green Lanterns

Lily Collins

as Lois Lane in DC's Superman