I for one think that it would be very cool if we get to see Arno Stark a.k.a. Iron Metropolitan a.k.a. Iron Man 2020 at some point in the franchise's future.
The M.C.U. may not have made any mention of Tony's older brother, but with the world keep asking "Who's going to be the next Iron Man?" ever since he died, I think that Arno would be the best answer to that. After all: he's been known to utilize his own Iron Man armors, and he's also taken on the alias a couple of times. Many keep thinking that Rhodey a.k.a. War Machine (who's also taken on the name on several occasions as well) or Riri Williams a.k.a. Ironheart will fill the void, but neither of them seem to have quite the same level of ingenious resourcefulness to either rival or come close to Stark's genius like Arno does. Thoughts?