Suggestions by @jameseller

Shawn Mendes

as Human Torch in Fantastic Four MCU

Maya Hawke

as Invisible Woman in Fantastic Four MCU

Liam Hemsworth

as Mr. Fantastic in Fantastic Four MCU

Leo Woodall

as Piotr Rasputin in MCU X-Men

Mena Massoud

as Remy LeBeau in MCU X-Men

Eddie Redmayne

as Nathaniel Essex in MCU X-Men

Bill Skarsgård

as St John Allerdyce in MCU X-Men

Tom Bateman

as Victor Creed in MCU X-Men

Jonah Hill

as Fred Dukes in MCU X-Men

Dylan Minnette

as Mortimer Toynbee in MCU X-Men

Dylan O'Brien

as Jamie Madrox in MCU X-Men

Natalie Dyer

as Mystique in MCU X-Men

Raegan Revord

as Kitty Pryde in MCU X-Men

Asher Angel

as Iceman in MCU X-Men

Lily James

as Alison Blaire in MCU X-Men

Sam Claflin

as Hank McCoy in MCU X-Men

Alicia Vikander

as Emma Frost in MCU X-Men

DeWanda Wise

as Ororo Munroe in MCU X-Men

Millie Bobby Brown

as Anna Marie LeBeau in MCU X-Men

Alex Wolff

as Kurt Wagner in MCU X-Men