#19 Avengers: Age of Ultron

Released in 2015, this USA sequel grossed $1.405 billion. It introduced key characters like Vision and Scarlet Witch, further expanding the scope of the Marvel Cinematic Universe.
When Tony Stark and Bruce Banner try to jumpstart a dormant peacekeeping program called Ultron, things go horribly wrong and it’s up to Earth’s mightiest heroes to stop the villainous Ultron from enacting his terrible plan of human extinction.