Here is every superhero movie that will be released in 2021. Superhero movies have become the dominant genre of blockbuster entertainment in recent years. The Marvel Cinematic Universe is the biggest movie franchise of all-time and saw Avengers: Endgame become the highest-grossing movie ever in 2019. Their output is increasing in 2021 to include four movies and six Disney+ shows. The MCU's ongoing popularity has led Sony to restart its efforts to build its own Marvel shared universe. Meanwhile, the DC Extended Universe is continuing to move forward with plans to release as many as six movies per year between theaters and on HBO Max.