There may have "only" been three Iron Man movies to date, but it's Robert Downey Jr. seventh appearance in a Marvel movie, the most recent of which is Captain America: Civil War.
When USA Today went to speak with Downey Jr. on the set of Civil War, they asked him if a fourth Iron Man was in the offing, and he reportedly replied: "I don’t think that’s in the cards. In a way it’s Cap 3 but for me it’s like my little Iron Man 4 and then it's back to the thing we all recognize. Everything pulls over to the side of the road when the thunder of an Avengers thing comes through because that’s how it is until it changes. If it changes."
Robert Downey Jr. just delivered some bad news for 'Iron Man' movie fans: Marvel/DisneyBad news, "Iron Man" fa... https://t.co/0tYdmgMlrl
— Business Insider (@NewsdeskInsider) March 14, 2016
For those concerned regarding the direction Tony Stark will take in Civil War now that he's warring with Captain America, he's not going to go "total villain" like he does in the comic series: "If we’re going to go there, then we’ve got to save it for my swan song. I would still like to keep a general audience and mildly be in their favor somehow."
While Captain America: Civil War will open in May, the next two "Avengers" films are set for release in 2018 and 2019. And then there's the rest.