Suggestions by @user_26273

David Bowie

as The Grandmaster in MCU 2000's (Reboot)

Sylvester Stallone

as James Buchanan "Bucky" Barnes in MCU 90's (Reboot)

Famke Janssen

as Black Widow in MCU 90's (Reboot)

Michelle Yeoh

as Mantis in MCU 90's (Reboot)

Pilou Asbæk

as Sabretooth in MCU X-Men

Jodie Comer

as Mystique in MCU X-Men

Katheryn Winnick

as White Queen in MCU X-Men

Maya Hawke

as Rogue in MCU X-Men

Rufus Sewell

as Magneto in MCU X-Men

Ken Watanabe

as Dr No in SPECTRE Modern day cast

Drew Barrymore

as Sharon Carter in MCU 90's (Reboot)

Gene Hackman

as Obadiah Stane in MCU 90's (Reboot)

Rufus Sewell

as Helmut Zemo in MCU 90's (Reboot)

Ralph Fiennes

as Johann Schmidt in MCU 90's (Reboot)

Christopher Lee

as Baron Mordo in MCU 90's (Reboot)

Sigourney Weaver

as Hela in MCU 90's (Reboot)

Peter Stormare

as Ulysseus Klaw in MCU 90's (Reboot)

R. Lee Ermey

as Thaddeus Ross in MCU 90's (Reboot)

David Bowie

as The Collector in MCU 90's (Reboot)

Brian Blessed

as Odin in MCU 90's (Reboot)