RDJ's contract with the MCU supposedly up after ENDGAME.

““Iron Man 2” is a topic of conversation, as he and Favreau are currently collaborating on a story for the much anticipated sequel. “Now Justin Theraux who wrote ‘Tropic Thunder’, is writing it and Jon and I are working on the story with him. It’s pretty great and I think it’s going to be cool. I think it’s going to appropriately well thought out so that we don’t forget what got us the response that we appreciated so much, which is, we didn’t say, ‘Great, now that this is like this, now we’re going to twist it and do this with it.’ It’s now; I’m not saying we’re going to do bits. I think more of the same; it is a very rich feel, because it was a very simple movie, if you ask me. It was an origin story.”

Which apparently was not the case with the other big summer movie “The Dark Knight”. “My whole thing is that that I saw ‘The Dark Knight’. I feel like I’m dumb because I feel like I don’t get how many things that are so smart. It’s like a Ferrari engine of storytelling and script writing and I’m like, ‘That’s not my idea of what I want to see in a movie.’ I loved ‘The Prestige’ but didn’t understand ‘The Dark Knight’. Didn’t get it, still can’t tell you what happened in the movie, what happened to the character and in the end they need him to be a bad guy. I’m like, ‘I get it. This is so high brow and so f—king smart, I clearly need a college education to understand this movie.’ You know what? F-ck DC comics. That’s all I have to say and that’s where I’m really coming from.”

Well clearly Downey isn’t about to do anything for DC Comics anytime soon. “You know, you’re never too old to burn your bridges because I believe I have offended everyone,” he says, laughingly. “I think I’ve got a couple more. ‘I’ll burn that bridge when I come to it’ is my favourite phrase I’ve ever coined.”

We know we’ll be getting at least two more outings from Tony Stark in Avengers: Infinity War and its as-yet-untitled sequel, but with Kevin Feige suggesting that the two-part superhero epic will mark the “final chapter” for certain Marvel heroes, Downey has now suggested that the end may be in sight as he wants to call it a day “before it’s embarrassing”.

“Everyone says to me it’s like a glove that fits so well,” said Downey in an interview with News Corp Australian Network. “I have to start over every time but I am starting over with a pretty solid base. I just never want to blow it for the last six or seven [Marvel movies] I have done by dropping the ball because I decided to go do it one more time. I just want to hang up my jersey before it’s embarrassing.”

Downey also went on to explain what drew him to Homecoming, stating that: “It’s this cyclical thing. I could have said when the first Avengers came out: ‘It’s never going to get any better than that. Everybody stop.’ But to me it’s always about people and opportunities, like the Russos, who I adore. [On Spider-Man: Homecoming] I felt like we were literally back in the writer’s room on the first Iron Man. So there was a real sense of a homecoming toward this — not experimental, because there is so much more data now and the process is so much more streamlined — but I didn’t feel like I was being asked to just fit in somewhere. They wanted us to bring our own little thing.”