It would take about 48 hours if you were to watch every movie set in the Marvel Cinematic Universe, according to some deep investigative work by Screen Rant. To be clear, that doesn't account for breaks to eat, sleep, pee, and go outside. That's two days straight of various planets, and eventually the universe, in peril over and over and over again.
You could do that, if you were a truly depraved soul. Or you could skim Wikipedia summaries and then watch this delightful 7-minute video of a high school homecoming dance that sums up Avengers: Infinity War and Avengers: Endgame with some fun choreography. Read more...More about Avengers, Infinity War, Endgame, Culture, and Web Culture