Part of what has made Spider-Man such a popular comic book character over the years is this relatability. Peter Parker is just an average guy, who has to deal with school and work and girl trouble, in addition to his time fighting crime. Similarly, the young Barry Allen in Justice League is the closest thing to an audience surrogate on the superheroic team. Despite his own incredible powers, he is still in many ways just a kid surrounded by gods and legends. In Justice League, Barry Allen's dad is locked up for murdering his mom, a crime Barry doesn't believe he committed. Barry gets a job at the end of the film and remains committed to proving his father's innocence. While this isn't quite everyday stuff, Barry Allen's concerns are arguably still more personal and small-scale than the rest of the League's. Neither Spider-Man nor The Flash really have any idea what they're doing, and they are both just doing the best they can to get by and juggle their personal lives with their alter-egos. To Goldstein, this relatability makes them interesting and similar characters.