*Spoiler Alert* Actor Robert Downey Jr is reported to return as Iron Man in the upcoming Marvel movie, The Black Widow. He will star alongside Scarlett Johansson. Downey's character Iron Man was killed in the last Marvel movie.
While Johansson's character Black Widow was also killed. Since this movie is a prequel to the Endgame, hence both the characters are being revived. Although it is unclear how big Downey's role would be.