In the end of Iron Man 3 , Tony Stark undergoes surgery to get the arc reactor removed from his chest . So , in the Avengers : Age of Ultron , is he just like everyone else -LRB- e.g. , Rhodey -RRB- using the suit ? If that 's the case , why ca n't Captain America , Black Widow and Hawkeye use it too ?
With no arc reactor and suits left , what is next for Tony Stark ? How is Iron Man 4 going to be ?