Robert Downey Jr., an actor famous not only for his interpretation of the well-known superhero Iron Man part of the universe The Marvel movies, could appear for one last time in the role of Tony Stark in the film that will star Scarlett Johansson in the guise of Black Widow.
The film, in fact, will be set before the events of Avengers: Endgame, precisely for this reason its presence is not entirely to be excluded. According to the site Deadline, in fact, there is talk of a simple appearance of the actor in the film who will take part for the last time in the role of Tony Stark. Obviously none of this was made official by The Marvel movies although the news is not to be considered official; Deadline in fact had previously reported the presence of Millie Bobby Brown in The Eternals then denied by the actress herself.
The Black Widow storyline takes place temporally between the events of Captain America: Civil War and those of Avengers: Infinity War, narrating the exploits and adventures of Natasha Romanoff and the Secret Avengers.