It was a definite shock to some when Black Widow was revealed to be on Team Iron Man in Captain America: Civil War, mainly due to her and Cap's time together during Captain America: Winter Solider.
Many had assumed that new friendship would result in her joining Team Cap, but when ComicBook.com's Ashley Robinson caught up with Executive Producer Nate Moore, he explained how her allegiance to Tony came about.
"We talked a lot about what would make sense logically right, so you'd sort of seen the other films, some characters you met for the first time in Age of Ultron, some have been around as long as Iron Man 1, and it's really about giving them a point of view that didn't feel like it was disingenuous to the character, and I think sometimes that ended up with characters that we didn't expect to be on certain sides. Like Black Widow teaming with Iron Man. I think it was unexpected even for us but as we talked about it from a storytelling point of view, it really made sense because I think Black Widow is more pragmatic than we give her credit for, and sometimes she's looking at the solutions from a different angle than Tony Stark, who's very emotional, and even though they don't react to the same things, in the same way, their conclusion that they came to ended up being the same. So it really was talking each character through like that to figure out who would end up where."
The points Moore makes are all solid, and while she is on Tony's side, it isn't without an understanding of Cap's position.
We'll all get to see how this plays out when Civil War opens on May 6th.