The stand-alone film about the Avengers' Black Widow doesn't have a premiere date yet, but we do know that the story is reportedly taking place before the first Avengers movie, so we might get to see a bit of the spy-turned-heroine's origin story. Considering that Black Widow is likely the next movie to enter production, we think it's a fair guess that this will be the Marvel film to drop on May 1, 2020.