Captain America Civil War: 10 Implications For Infinity War
5. Iron Man & Cap's Uneasy Reconciliation
Civil War ended with Tony Stark reading a letter from Cap, where Cap says he'll be ready if Iron Man and the other legit Avengers ever need him. This is the movie's most blatant nod to Infinity War, as it's pretty obvious that Iron Man will come a-calling once Thanos arrives on Earth.
Though the two Avengers teams will inevitably team up against Thanos, that doesn't mean Tony and Steve will be friends or have gotten over their differences in Civil War. They can team together for the greater good while still bearing huge scars, both physical and emotional, from Civil War's third act in particular.
This will be a major plotline running through the movie, and after the strong character beats both characters were dealt in Civil War, hopefully Infinity War will run with the ball, playing up the characters' mutual respect for and disagreement with one another.
Whether this will ever be truly resolved remains to be seen: perhaps one of the two will die before the other gets a chance to fully reconcile everything that's happened. Perhaps only in death does the cathartic moment come (but more on that later).