Suggestions by @jamesthethinker

Alex Wolff

as Iceman in MCU X-Men

Christian Kane

as Sabretooth in MCU X-Men

Giancarlo Esposito

as Professor X in MCU X-Men

Sonequa Martin-Green

as Storm in MCU X-Men

Jim Caviezel

as Beast in MCU X-Men

James McAvoy

as EDWARD NYGMA in Batman

Bryan Cranston

as MR. FREEZE in Batman

David Suchet

as Alfred Pennyworth in Batman

Sadie Sink

as Barbara Gordon in Batman

John Schneider

as Jonathan Kent in Superman

Hayden Panettiere

as Kara zor-el in Superman

Michelle Monaghan

as Lois lane in Superman

Missy Peregrym

as Lois lane in Superman

Rebecca Romijn

as Mercedes Mercy Graves in Legion Of Doom

Hafþór Júlíus Björnsson

as Solomon Grundy in Legion Of Doom

Jerry Trainor

as Toy Man in Legion Of Doom

Ving Rhames

as Gorilla Grodd in Legion Of Doom

Zachary Quinto

as Brainiac in Legion Of Doom

Winston Duke

as Superthug in Blue Falcon and Dynomutt

Sia

as Queen Hornet in Blue Falcon and Dynomutt