Originally Posted by cherokeesam
One of those things is that Sharon Carter --- as much as I hate to say it --- is largely redundant in the context of the MCU. Sexy superspy? Widow's already got that covered. Unless they're reinventing Sharon to have a different skillset that would clearly distinguish her from Natasha (or Maria Hill, for that matter), then general audiences would probably be wondering what her real purpose is in the movie.
I don't think the audience would be wondering that. If an audience likes a character, they don't care if someone else can do what they do, so long as they do is something worth their attention.