Iron Man wants to curb a perceived destructive vigilantism and place the Avengers under UN control. Captain America thinks that would hinder their evil-fighting autonomy. Factions form and fight.
All this latest Avengers outing had to do was be better than Age of Ultron. It’s more dramatically coherent and, for want of a better word, mature. I realize internal strife is built in to the title, but this “team” still spends way too much time fighting one another. OK, superhero movies are subjective. I was not edified or particularly entertained, but many still into the genre thought it was pretty good. (146 min)