Suggestions by @user_349011

Ralph Fiennes

as James Craddock / Gentleman Ghost in DCU’s Superboy: A New Spark of Hope

Nikolaj Coster-Waldau

as Werner Zytle / Count Vertigo in DCU’s Superboy: A New Spark of Hope

Liza Soberano

as Artemis Crock / Tigress in DCU’s Superboy: A New Spark of Hope

Dolph Lundgren

as Jordan Mahkent / Icicle in DCU’s Superboy: A New Spark of Hope

Jamie Foxx

as Floyd Lawton / Deadshot in DCU’s Superboy: A New Spark of Hope

Geno Segers

as Soloman Grundy in DCU’s Superboy: A New Spark of Hope

Ralph Fiennes

as Victor Fries / Mr. Freeze in DCU’s Superboy: A New Spark of Hope

Krysten Ritter

as Eve Eden / Nightshade in DCU’s Superboy: A New Spark of Hope

Joseph Gordon-Levitt

as Nathan Prince / Copperhead in DCU’s Superboy: A New Spark of Hope

Scott Eastwood

as Thomas Reese Blake / Catman in DCU’s Superboy: A New Spark of Hope

Mike Colter

as Waylon Jones / Killer Croc in DCU’s Superboy: A New Spark of Hope

María Gabriela de Faría

as Dr. Angela "Angie" Spica / Engineer in DCU’s Superboy: A New Spark of Hope

Riley Keough

as Dr. Doris Zuel / Giganta in DCU’s Superboy: A New Spark of Hope

Isabel Lucas

as Barbara Ann Minerva / Cheetah in DCU’s Superboy: A New Spark of Hope

Robert Maillet

as The Elephant in DCU’s Superboy: A New Spark of Hope

Derek Mears

as Backlash in DCU’s Superboy: A New Spark of Hope

Manu Bennett

as Horsepower in DCU’s Superboy: A New Spark of Hope

Andrew Garfield

as Mac McGavin / Crackle Mac in DCU’s Superboy: A New Spark of Hope

Noah Beck

as Adonis in DCU’s Superboy: A New Spark of Hope

John Boyega

as Nicolas Cairns / Kor-Amon / Alpha in DCU’s Superboy: A New Spark of Hope