Suggestions by @iamthedarkbourne

Jamie Lee Curtis

as Martha kent in Superman 2: world's finest

Neil Patrick Harris

as Mister Mxyzptlk in Superman 2: world's finest

Sasha Calle

as Supergirl in Superman 2: world's finest

Griffin Gluck

as Tim drake in Superman 2: world's finest

Hailee Steinfeld

as Batgirl in Superman 2: world's finest

David Harbour

as Jim gordon in Superman 2: world's finest

Walker Scobell

as Billy batson in Superman 2: world's finest

Jessica Green

as Wonderwoman in Superman 2: world's finest

Samara Weaving

as Lois lane in Superman 2: world's finest

Patrick Wilson

as Harvey dent in Superman 2: world's finest

Spoiler

as Something pure evil has came.. in Superman 2: world's finest

Harrison Ford

as Johnathan kent in Superman 2: world's finest

Bryan Cranston

as Lex luthor in Superman 2: world's finest

Benedict Cumberbatch

as Brainiac in Superman 2: world's finest

Sterling K. Brown

as Martian manhunter in Superman 2: world's finest

Jensen Ackles

as Hal jordan in Superman 2: world's finest

Cameron Monaghan

as The joker in Superman 2: world's finest

Alan Ritchson

as Arthur curry in Superman 2: world's finest

Michael B. Jordan

as John Stewart in Superman 2: world's finest

Robert De Niro

as Carmine falcone in Superman 2: world's finest