Captain America: The Winter Soldier In April 2011, before "" was released in theaters, screenwriters Christopher Markus & Stephen McFeely announced that Marvel had already hired the duo to work on the film's sequel. In September 2011, Chris Evans said that a sequel may not be released until 2014. In January 2012, Neal McDonough, who played Dum Dum Dugan in "Captain America: The First Avenger", mentioned that a sequel would likely be filmed after the completion of "", which would likely have been before the end of 2012. By March 2012, Marvel whittled down the possible directors for the sequel to three candidates: George Nolfi,
Captain America: The Winter Soldier Robert Redford, and Samuel L. Jackson. In "Captain America: The Winter Soldier", Captain America, Black Widow, and Falcon join forces to uncover a conspiracy within S.H.I.E.L.D. while facing a mysterious assassin known as the Winter Soldier. A major influence in "The Winter Soldier" was conspiracy fiction from the 1970s such as "Three Days of the Condor", with the script also drawing from the Winter Soldier story arc written by Ed Brubaker. The script was written in 2011, with the Russo brothers entering negotiations to direct in June 2012 and casting beginning the following month. Principal photography commenced in April 2013