With production aiming to begin in March of 2013, Marvel Studio's Captain America: The Winter Solider is working on casting a new female lead.
Though the new female character is not yet confirmed, it is said to be a romantic interest to Chris Evans' Steve Rogers. Fans of the comics know that the odds point to the role being that of Sharon Carter. Originally the sister of Peggy Carter (played in Captain America: The First Avenger by Hayley Atwell), Peggy was later retconned to be Peggy's niece.
The list of names includes Jessica Brown Findlay ("Downton Abbey"), Emilia Clarke ("Game of Thrones"), Teresa Palmer (I Am Number Four), Imogen Poots (Fright Night) and Alison Brie (The Five-Year Engagement).