Well, it's quite significant as it offers a dark twist to the traditional superhero origin. Instead of a hero being born out of noble intentions, Brightburn's origin shows a more malevolent force at play. It challenges the common perception of superpowered beings always being good.
No. 'Brightburn' is a fictional horror movie, not based on a true story. It takes the concept of Superman's origin but twists it into a dark and terrifying tale.