Suggestions by @adamreece

John Wesley Shipp

as Jay Garrick (Earth-3) in The Flash 2

Superman (George Reeves)

as Superman (Sholem) (CGI due to George Reeves death) in The Flash 2

Johnny Rockwell

as Superman (Superboy (1961)) in The Flash 2

Gerard Christopher

as Superman (Superboy) in The Flash 2

Dean Cain

as Superman (Lois and Clark) in The Flash 2

Melissa Benoist

as Supergirl (Earth-38) in The Flash 2

Tyler Hoechlin

as Superman (Earth-38) in The Flash 2

Superman (Brandon Routh)

as Superman (Singer) in The Flash 2

Superman (Christopher Reeve)

as Superman (Donner) (CGI due to Christopher Reeve’s death) in The Flash 2

Henry Cavill

as Superman in The Flash 2

John Wesley Shipp

as Barry Allen 3 in The Flash 2

Dolph Lundgren

as Eddie Brock/Venom in Venom (1998)

Leonardo DiCaprio

as Peter Parker in The Amazing Spider-Man (1992)

Captain America (1944)

as Worst Marvel Film in Best & Worst of Franchises

Jamie Bell

as Earth-15866 The Thing in (MCU) Avengers: Secret Wars (2027)

Michael B. Jordan

as Earth-15866 Human Torch in (MCU) Avengers: Secret Wars (2027)

Kate Mara

as Earth-15688 Invisible Woman in (MCU) Avengers: Secret Wars (2027)

Miles Teller

as Earth-15688 Mr. Fantastic in (MCU) Avengers: Secret Wars (2027)

Jack Black

as Namor in Namor (2001)

Dolph Lundgren

as The Punisher in Deadpool and Spider-Man