Captain America: Civil War

“United we stand. Divided we fall.”

Steve Rogers (Chris Evans) wants the Avengers to answer to no one but themselves, even after the world's governments pass an act to regulate superhuman activity. Tony Stark (Robert Downey Jr.) sees it the other way, and the team splits behind each of them. Joe and Anthony Russo build it around two friends who can't agree, and the old loyalty between them is the thing that gets tested.