The MCU, or Marvel Cinematic Universe, kicked off when the first Iron Man hit screens in 2008 and is going to hit its peak during Avengers: Infinity War. Coming in 2018, the film will not only team-up various heroes, it will team-up The Avengers and the Guardians of the Galaxy plus other characters like Dr. Strange and Spide-Man. The Russo Brothers helmed epic is expected to be a blockbuster but some are worried that having over a dozen heroes and scores of villains might be too much to handle. Captain America: Civil War was a thrill ride but it already felt busy, this is an Avengers movie, and one that's going to be on an even larger scale (hopefully better than the mediocre Age of Ultron).