Spoilers ahead for Avengers: Endgame.
Avengers: Endgame has been in theaters for three weekends, still maintaining the top spot at the box office over new releases like Detective Pikachu. The Russo Brothers did the impossible with the blockbuster, surpassing even Infinity War in regards to scope and character-driven story. Endgame was intimately connected to the previous 21 movies in the MCU, and that includes Phase Two's finale Avengers: Age of Ultron.
When Iron Man and Nebula were rescued by Captain Marvel and towed back to Earth in Endgame, Tony had an altercation with Steve Rogers. Exhausted and starving, he maintained he was right all along regarding the measures needed to properly protect the planet. Now The Russo Brothers have come to Tony's defense in regards to his Age of Ultron actions, with Joe Russo saying:
He was not wrong that there was a great threat coming, and they needed to build a suit of armor around the world, and at what point do civil liberties trump—no pun intended—do civil liberties come before the government’s ability to protect its citizens? I think what’s interesting is that to some extent, they had to go through this. There was a sense of destiny to this. They had to go through it to win it. And in a way both he and Cap were right.
Captain America and Iron Man's relationship started becoming strained during Avengers: Age of Ultron, as they had idealogical differences to the morality of superheroics. Ultron's inception came as a result of Tony's singular focus on protecting the planet, although Earth could have used it when Thanos and his forcea came knocking in Infinity War.
Of course, Joe Russo's comments to Slate also point out that Captain America has his own valid points in the argument. Both heroes had the best of intentions, but were ultimately unable to come together and find viable compromises. That powder keg eventually exploded in Captain America: Civil War, and it broke up the Avengers in the process.
Ultron may have ended up turning against his creators and the planet, but the thought behind his creation was a big picture idea. Tony and Bruce Banner wanted to provide a more comprehensive protection of the planet, with Iron Man knowing that the Battle of New York was no fluke. Unfortunately, Ultron had other plans-- although Vision was also born in the process.
But Thanos was only able to be defeated because the surviving heroes were able to work together. Despite Tony's initial reaction to arriving home, he was able to bury the hatchet with Steve Rogers, and they made the time heist happen together. The duo also faced off against Thanos during the epic final battle, and Cap even witnessed Iron Man's final breath.
Avengers: Endgame is in theaters now. Be sure to check out our 2019 release list to plan your next trip to the movies.