Scarlett Johansson has indicated that a solo Black Widow movie is just a matter of time - specifically of finding time for Marvel to make the movie.
“I’ve talked to Kevin Feige about it. We’re creatively really compatible," Johansson explained to TotalFilm (via GamesRadar). "I think we both agree that the character is right for a standalone, it’s just a case of timing at this point for both Marvel and myself.”
“Marvel has a really huge roster. They’re looking four years ahead. I also have a lot of things that I want to do,” Johansson continued. “If I did it, I would dedicate myself completely to making it amazing. It would have to be the best version that movie could possibly be. Otherwise, I would never do it."
"[I] don’t know if I have the capacity for it. I think the fans were adamant about it, it could be done. It should be done, probably. It’d have to be done the right way, though. It’d really have to be its own standalone and its own style and its own story. But there’s a lot of great stuff that you could do with it. It could just be awesome.”
Fans have lobbied for a Black Widow solo-film since she became a breakout character in 2012's Avengers. In May, 2016, Feige, the president of Marvel Studios, said the studio was "committed" to creating a Black Widow film, though he projected no timeline for when such a project would take place.
Johansson will likely next appear as Black Widow in Avengers: Infinity War, due out in theaters May 4, 2018.