The "Doctor Strange in the Multiverse of Madness" Cast Brings Together MCU Favorites and New Faces

In the MCU, Peggy Carter is an agent who meets Captain America during World War II and becomes one of the first leaders of S.H.I.E.L.D. But in Marvel's "What If...?" Disney+ series, one episode imagined a world where Peggy took the supersoldier serum and became Captain Carter. Her shield featured a Union Jack shield instead of Captain America's star.

In a new trailer, that shield is clearly visible. It seems that Captain Carter will definitely be in the movie, and it seems likely that Hayley Atwell will reprise her role again.