It’s entirely possible we could see Scarlett Johansson in another Black Widow movie, as long as it takes place before the events of Infinity War or directly after.
Scarlett Johansson seems to be teasing that we’re going to see more than one Black Widow movie.
Johansson’s Romanoff character sacrificed her life to save the universe, so the Black Widow movie takes place before those events.
Scarlett Johansson is excited for MCU fans to see Black Widow.