Avengers: Endgame (2019)

Avengers: Endgame (2019) epicly concludes a 22-film saga with a staggering $2.798 billion worldwide gross, making it the highest-earning superhero movie ever. Its marketing spend was cheaper than the typical blockbuster, with an 8% marketing-to-box-office ratio versus the 15% industry average, maximizing profitability. The film outperforms Spider-Man: Into the Spider-Verse (#2 on this list) in box office revenue, earning 20% more in its opening weekend than any other superhero movie, while tying The Dark Knight (#1 on this list) with a 94% Rotten Tomatoes score.