In Spider-Man Homecoming, we learn that Tony & Pepper get officially engaged.
It is far from certain that we'll see an Iron Man 4 movie with RDJr.
Do you think that Marvel Studios is trying to give some kind of closure to the storyline of Iron Man through his cameos in different Marvel movies ?
Does it mean that the two future Avengers movies might provide some kind of conclusion to Tony Stark's career as Iron Man ?
It doesn't necessarily mean that he will die but, maybe, he will retire ...
I wonder if, in a future Marvel movie, the Ten Rings will appear again as an antagonist or not ...
I don't think that they really think that far ahead in such detail. I think it's more that now that Stark is an ensemble character, it has become more possible for him to escape certain solo character tropes, such as never getting married. So they marry him, because why not marry him? It's not going to get in the way of any solo-movie plots anymore. Kind of a pity: I'd have liked to see him with Rumiko at some point.