Sure, Spidey and Ant-Man have been said to be added to the film to provide comic relief; that makes sense. However, think of the political climate we live in...such a scene would have the social justice warriors out with their internet pitchforks and torches because it made the Black Widow look weak or silly and women cannot be anything other than badass. You know how some people like to make a stink over nothing (remember the rage debate over her revelation she can't have kids from Age of Ultron?).
If there was a comedic female character present during the big fight, I could see something like this happening to her, but since there aren't any present, I wouldn't hold my breath is all I'm saying.
But, hey, what do I know?