Black Widow's Contessa Valentina Allegra de Fontaine: The Secret History of Julia Louis-Dreyfus' Marvel Cameo

Picking up where The Falcon and the Winter Soldier left off, Black Widow features a cameo by a very unexpected character. But what does this mean for the future of the MCU? Let's dig into the story of Julia Louis-Dreyfus' character, the Contessa Valentina Allegra de Fontaine!