Scarlett Johansson’s character from “Iron Man 2” and “Avengers,” Black Widow, figures heavily into the plot of “The Winter Soldier,” as much as anything because she represents a methodology that is morally more flexible than the one from which Captain America was born. “We’ve always said he’s our Gary Cooper, and the world shifts to him and it’s his job to tell everybody, ‘Here’s how we ought to be doing this’,” McFeely said. “She’s a lot more flexible in terms of loyalties and how we’re going to get these jobs done. We didn’t pick her out of thin air — she best represented the century and that grey morality.
"She’s also just a great person to poke at his weak spots," Markus continued. "We know he hasn’t had that much romantic experience — he’s never gotten to dance. We don’t know exactly what he’s up to on his nights off from the Avengers, but probably not that much. So you have this very beautiful, very forward almost deliberately provocative woman who is sort of poking at him to see what his reaction is and it’s just fun to get at his soft underbelly that way."