Suggestions by @aaronkime

Dwayne Johnson

as Champion of the Universe in Elders of the Universe

Victoria Justice

as Voyager in Elders of the Universe

William Shatner

as Astronomer in Elders of the Universe

William Shatner

as The Astronomer in Elders of the Universe

Cary Elwes

as Magneto in Characters who have not appeared, but should appear, in the MCU

Rami Malek

as APOCALYPSE in X MEN (FOR MCU)

Danila Kozlovsky

as COLOSSUS in X MEN (FOR MCU)

Arnold Schwarzenegger

as CABLE in X MEN (FOR MCU)

Eve Hewson

as DOMINO in X MEN (FOR MCU)

Lil Rel Howery

as Weasel in X MEN (FOR MCU)

Maia Mitchell

as Magik in X MEN (FOR MCU)

Rudy Youngblood

as FORGE in X MEN (FOR MCU)

Method Man

as LUCAS BISHOP in X MEN (FOR MCU)

Booker Huffman, Jr.

as LUCAS BISHOP in X MEN (FOR MCU)

Addison Rae

as Dazzler in X MEN (FOR MCU)

Kevin Costner

as WILLIAM STRYKER in X MEN (FOR MCU)

Mimi Keene

as KITTY PRYDE in X MEN (FOR MCU)

Moritz Bäckerling

as NIGHTCRAWLER in X MEN (FOR MCU)

Jason Momoa

as LOGAN in X MEN (FOR MCU)

Lucy Hale

as MYSTIQUE in X MEN (FOR MCU)