‘The Avengers’ (2012)
Sequels weren’t new and neither were long, crowded, noisy superhero spectacles when this juggernaut landed. But “The Avengers,” released after Disney’s acquisition of Marvel Studios, was nonetheless a big industry bang: It heralded the dominance of the Marvel Cinematic Universe, where we all now live whether we like it or not.
https://www.nytimes.com/2019/11/24/movies/best-movies-2010s-decade.html