Worldwide gross: $2,048,359,754The traumatic cliffhanger at the end of Infinity War was a must-see, movie-going moment for fans. No one was expecting the film to end on such a grim note with Thanos (Josh Brolin) not only defeating the Avengers, but snapping away half of all life from existence.When the film debuted, it set a new record for the biggest worldwide opening weekend with $640.9 million.It crossed $1 billion in just 11 days.In 48 days, the film crossed $2 billion worldwide.Worldwide gross: $2,069,521,700Disney's return to a galaxy far, far away intrigued both old and new fans as it brought back original cast members and teamed them up with a new roster of characters.At the time, The Force Awakens set a record for the biggest opening weekend ($247.9 million) and was previously the fastest film to pass $1 billion worldwide, in 12 days.Worldwide gross: $2,201,647,264The James Cameron-directed film was the first movie to gross more than $1 billion worldwide.At the time, it was the most expensive movie made. The film finally crossed $2 billion during its rerelease in 3D in 2012.Worldwide gross: $2,797,501,328Fans needed to know if the remaining Avengers could rise up, defeat Thanos, and reverse the effects of the end of Infinity War. They came out in droves as the film shattered box-office records, grossing over $1.2 billion worldwide opening weekend, nearly double that of the opening weekend for Infinity War.It only took Endgame 11 days to cross $2 billion. That's the same amount of time it took Infinity War to cross its first billion.Worldwide gross: $2,879,059,572At the time, Avatar, following the 10-foot-tall Na'vi on their home of Pandora, became the fastest film to cross $1 billion, doing so in 19 days. It eventually crossed $2 billion in 47 days.Its long-awaited sequel, Avatar: The Way of Water, is in theaters in December.