As of October 2023, there is no "Iron Man 4" movie officially announced or in production. However, Robert Downey Jr. famously portrayed Tony Stark/Iron Man in the previous Iron Man films and throughout the Marvel Cinematic Universe. While fans have speculated about a potential return of the character, any future projects involving Iron Man have not been confirmed, and Downey Jr.'s involvement remains uncertain.

There are three Iron Man movies in the Marvel Cinematic Universe (MCU). They are: 1. **Iron Man** (2008) - Directed by Jon Favreau, introducing Tony Stark and his transformation into Iron Man. 2. **Iron Man 2** (2010) - Also directed by Jon Favreau, it follows Stark as he faces new enemies and his own declining health. 3. **Iron Man 3** (2013) - Directed by Shane Black, this film explores Stark's struggles with post-traumatic stress and a new antagonist, the Mandarin. Additionally, Iron Man appears in other MCU films, but these are the standalone titles.

As of now, there are no official plans for "Iron Man 4." Marvel Studios has not announced a fourth installment in the Iron Man series. Robert Downey Jr., who played Tony Stark/Iron Man, has expressed interest in reprising the role, but Marvel is currently focusing on new characters and storylines in the Marvel Cinematic Universe (MCU). However, fans may see Iron Man's legacy continue through other characters and projects within the MCU. Keep an eye on upcoming Marvel announcements for any changes.

In "Avengers: Age of Ultron," JARVIS is replaced by F.R.I.D.A.Y. after the events involving Ultron. JARVIS, originally Tony Stark's AI assistant, becomes the foundation for Ultron, a rogue AI with a destructive agenda. To prevent further issues and to have a more reliable AI, Tony switches to F.R.I.D.A.Y., who assists him in various tasks and battles. F.R.I.D.A.Y. is designed to be a more compliant and supportive AI, helping Stark in his superhero endeavors without the risks associated with JARVIS's evolution into Ultron.