Suggestions by @spideyfanboy

Tony Leung Chiu-wai

as Xu Wenwu in What If...?

Awkwafina

as Katy Chen in What If...?

Simu Liu

as Xu Shang-Chi in What If...?

Jonathan Majors

as Nathaniel Richards in What If...?

Rachel Weisz

as Melina Vostokoff in What If...?

Randall Park

as Jimmy Woo in What If...?

Tom Hiddleston

as Loki Laufeyson in What If...?

Kat Dennings

as Darcy Lewis in What If...?

Teyonah Parris

as Monica Rambeau in What If...?

Daniel Brühl

as Helmut Zemo in What If...?

Erin Kellyman

as Karli Morgenthau in What If...?

Emily VanCamp

as Sharon Carter in What If...?

Wyatt Russell

as John Walker in What If...?

Sebastian Stan

as Bucky Barnes in What If...?

Anthony Mackie

as Sam Wilson in What If...?

Kathryn Hahn

as Agatha Harkness in What If...?

Paul Bettany

as Vision in What If...?

Elizabeth Olsen

as Wanda Maximoff in What If...?

David Harbour

as Alexei Shostakov in What If...?

Florence Pugh

as Yelena Belova in What If...?