Peggy Carter is a fictional agent from Marvel Comics, a WW2-era spy who inspired Captain America and later became a key ally in the Shield/C. Carter has no real-world political role and remains a staple in Captain America canon.
The Avengers: Doomsday trailer has released, uniting Thor, Captain America, X-Men, Fantastic Four and Doctor Doom across multiverse arcs. Marvel is positioning the film as the reset point for Phase Six, with RDJ's Doom returning and a cast that spans three universes. The teaser underscores a high-stakes clash that will shape the MCU’s future.