In one of the better-kept secrets in Marvel's history, eleven-time Emmy award-winning actress Julia Louis-Dreyfus made her surprise MCU debut as Contessa Valentina Allegra de Fontaine in the penultimate episode of The Falcon and the Winter Solider and emerges as a potential Big Bad of Marvel's second
TV series. According to sources close to the production, Louis-Dreyfus was slated to first appear in the Black Widow film which, in a pre-Covid world, was scheduled to debut in theaters May 1, 2020. But Marvel, reportedly, has even bigger ambitions for Louis-Dreyfus's villainous figure.
From Falcon and the Winter Soldier context clues, it's not a stretch to assume that Louis-Dreyfus might also be taking on the comic book role of the Power Broker. In the comics, Contessa Valentina Allegra de la Fontaine has gone by many names but one that carries the most potential in this context is
Madame Hydra.