In an interview for Disney twenty-three, a magazine available to D23 Gold Members, the actor (Chris Evans) said (as quoted by Yahoo Movies):
“Even though there are a lot characters, the focus is on Steve and his struggle. Especially his struggle with Tony Stark…It’s exciting to see a guy who’s as optimistic and as selfless as Steve be met with letdown, betrayal, frustration, and selfishness. There are events and people in his life that test him — that challenge him and force him to reevaluate who he is and what he wants out of life.”