According to Variety, it was originally planned that the role of Dauni would be small, and the actor would have to spend on the set only 3 weeks. But Downey demanded to increase the on-screen time of his hero and, accordingly, the fee.
Such behavior was very angry with the head of Marvel Entertainment Isaac Perlmutter, and he ordered to remove all episodes with an iron man from the scenario.
As we know, the actor and studios still managed to agree among themselves, but the fate of the Iron man can gain a new round.
Recall the many popular franchises, such as "Spiderman", "Batman" and "James Bond". These series lasts not one decade: the concept remains, but the actors change. Agree, a good marketing stroke for a long-playing franchise, after all, after years, the main actors physically cannot meet their character, and the "fresh blood" comes to replace.
Thus, no one will be a surprise that Robert Downey Junior will sooner or later give his wonderful suit to a young receiver.
In the meantime, we will look forward to the appearance on the screen of the first-in-kind "genius, billionaire, playboy and philantopa" performed by Robert Downey Jr.