When Captain America: The Winter Soldier hits the big screen on April 4, it will mark Scarlett Johansson’s third big screen appearance as Natasha “Black Widow” Romanoff. That will soon be followed by a fourth, Avengers: Age of Ultron, in 2015. According to Total Film‘s new interview with Marvel Studios President Kevin Feige (via Comic Book Movie), the much-anticipated sequel will feature a “very big” role for the character. What’s more, he teases that a Black Widow solo film may be the next step for the character.

“We learn more about her past,” Feige says of the Joss Whedon sequel, “and learn more about where she came from and how she became in that film. The notion of exploring that even further in her own film would be great, and we have some development work with that.”

Of course, Black Widow is going to first have to make it through the events of The Winter Soldier, which Feige promises is a game-changer for the MCU.

“We wanted to change the dynamic of the cinematic universe with this film,” Feige continues. “We wanted Cap and really the entire cinematic universe to be very different at the end of ‘Winter Soldier’ than it is at the beginning. Therefore, when we meet the Avengers at the top of ‘Age of Ultron,’ it’s a very different landscape than we left them at the end of the first film. Partially that’s because we love the rhythm that the comic books have developed. Each of the characters appear in their runs, occasionally they get together for a big event or crossover series, they part again, and then they come back together again.”

Avengers: Age of Ultron hits theaters on May 1, 2015.