2. It Has An Overarching Theme
Right now we're in the second stage of the superhero movie cycle. When the first X-Men, Spider-Man and Fantastic Four films came out, that was the first stage or the origin story. Which, besides including origin stories in every film, also meant they were about finding their feet. The studios were taking gambles, meaning they didn't want to take big risks elsewhere in the production. So most of the films were fairly cookie cutter, and didn't have much more going on beneath the surface plot which was usually also fairly standard except characters having destinies, or responsibilities, or whatever. All pretty par for the course. Now, you have superhero movies with themes. The Dark Knight was about post-9/11 America! Captain America: The Winter soldier commented on paranoia and NSA spying! For The Fantastic Four, it's a little more broad. In fact, based on Reg E Cathey's voiceover, that theme is
pretty close to Interstellar, about human beings fighting for survival with rad scientific discoveries. Which sometime go wrong. Maybe Interstellar mixed with Prometheus, then.