Ne Zha, the demon protagonist of Ne Zha 2. (CMC Pictures/Courtesy Everett Collection)The biggest movie of the year isn't about superheroes. It isn't ripped from a video game or a live-action remake of an animated children's classic. It's a sequel based on intellectual property that's familiar to much of the earth's population, but chances are, you haven't even heard of Ne Zha II until now.It's an animated action fantasy film that was released on Jan. 29 in mainland China, and has since made $2.2 billion at the global box office.