The next slate of movies will begin with Black Widow, which will be set in between the events of Captain America: Civil War and Avengers: Infinity War.
Tony Stark would still be alive at this point, kickstarting rumors of Robert Downey Jr. appearing in the upcoming blockbuster.
Now RDJ has responded to those rumors, in the perfect way.
The Marvel Cinematic Universe is in a precarious position at the moment.