Originally Posted by Loki882
Also, you stick something like "from the studio that brought you the Avengers, and the Iron Man trilogy" in front of it, and at least some people are going to check it out. I'd love to see a Captain Marvel film. However, I think that Black Widow is actually the most obvious choice, and the one in the best position to succeed at least at the moment, with Carol being a close second.
One big advantage that Black Widow has is that she is already well known with two major successful films under her belt already. There isn't much selling that needs to be done to get people in the theaters.
Ms. Marvel is more of a traditional superhero though. A Black Widow film would likely be (and should be) more of a James Bond style spy thriller.