Johansson has indicated in the past that a Black Widow movie is possible, but said timing has been a big issue.
Female comic book characters are clearly becoming more important, and that fact alone might be enough to spur Marvel toward accelerating its plans for a Black Widow movie.
Rumors persist that Joss Whedon might be interested in tackling the job of directing this hypothetical Black Widow movie.
As of right now, it doesn’t sound like there’s huge momentum for a Black Widow standalone movie.