Warning: The following story freely references major events from “Avengers: Endgame.” It is intended to be read after you’ve seen the film. So — after much discussion, and some friendly debate — we’ve ranked each MCU film in order of its significance to “Endgame.” Last chance to stop reading: “Avengers: Endgame” spoilers ahead. “Avengers: Age of Ultron” Maximoff is established …
