Suggestions by @tempest

Jon Hamm

as Blue Beetle (Dan Garrett) in DCU

Dane DeHaan

as Negative Man (Larry Trainor) in DCU

Trevor Jackson

as Vox (Mal Duncan) in DCU

Uli Latukefu

as Robotman (Cliff Steele) in DCU

Svetlana Khodchenkova

as Negative Woman (Valentina Vostok) in DCU

Domhnall Gleeson

as Mento (Steve Dayton) in DCU

Florian Munteanu

as Flex Mentallo in DCU

George MacKay

as Elongated Man (Ralph Dibny) in DCU

Jing Tian

as Element Woman (Emily Sung) in DCU

Gemma Arterton

as Elasti-Woman (Rita Farr) in DCU

Brooklynn Prince

as Dorothy Spinner in DCU

Chiaki Kuriyama

as Doctor Light (Kimiyo Hoshi) in DCU

Tatiana Maslany

as Crazy Jane (Kay Challis) in DCU

Dennis Christopher

as Chief (Niles Caulder) in DCU

Freida Pinto

as Celsius (Arani Desai-Caulder) in DCU

Matt Smith

as Ambush Bug (Irwin Schwab) in DCU

Ashley Liao

as Red Canary (Sienna) in DCU

Lizzy Greene

as Speedy (Mia Dearden) in DCU

Momona Tamada

as Red Arrow (Emiko Queen) in DCU

Froy Gutierrez

as Green Lantern (Kyle Rayner) in DCU