Is that ever a scenario in the comic books? I'm really just a Silver Age guy so I've missed more than I've caught over the past 35 plus years.
Steve
No it isn't, but I am trying to think of the natural evolution of the current story arcs.
In Iron Man 3 we see Stark developing armor that are all controlled remotely or through pre programmed circumstances. Seems possible that he could continue his work trying to remove the need for him to personally be Iron Man. Thus he creates Ultron (and perhaps Vision as well).
When Ultron goes bad, he calls in the Avengers for help.