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 First Avenger team of that name, and in November Johnston refuted speculation that the Sub-Mariner, an Invaders team-member in the comics, would be included. Johnston later explained that "the Invaders" had been discussed simply as a possible name for the squad of commandos Captain America leads in the film. Christopher Markus, one of the screenwriters, said the unnamed group was "called the Howling Commandos in the script, but no one says that out loud." The design as a whole tried to create technology that could be built in the 1940s, though with the added Cube technology in Hydra's case. Abandoned Nazi projects