Scarlett Johansson, the interpreter of Black Widow, the black widow in French since Iron Man 2 in 2010, has still not had the right to a solo film for her character. Back to the question:
During an interview with Variety, the actress let herself go to some confidences while silence reigns at the top of the Marvel tower:
"I would love for this film to become a reality. There are also plenty of avenues to explore, it has an exciting history […] But if this project comes to fruition, it will have to be different from other solo films. I think if fans really want to see this movie, it will eventually see the light of day."
Kevin Feige, the big boss of Marvel Studio, had said that making a feature film about Agent Romanoff was a brilliant idea. However, no plans are planned, and there is a good chance that it will only be after Thanos' defeat by the Avengerse.
