(Added: Biyuti posted about the history rewritten inclusion in an entry of theirs. I think they were more for having truth in movies.)
The movie had Howard Stark in the flashback part and the modern movie Nick Fury in it at the end. Agent Carter in the movie was a woman. I don't know if an Agent Carter existed in the comic books. If there was an Agent Carter, he most likely would have been male. If I am remembering correctly, in the Thor comic books, the Warriors Three were all male. They and Heimdall were all very white, too. So the movies have made a number of changes towards inclusivity. Some of the comic books written at the time that the original Captain America comic books were had what we'd now think of as wildly offensive depictions of characters of color. Attitudes were very different in the 1940s. Not that I expected the movies to have the massive prejudice of the comic books of the 1940s, but I didn't expect the races and genders of some of the heroes to change. I was thinking inside the box.