In a different universe from the Spectacular and Amazing universes we see a version of Harry Osborn who wasn't friends with Peter Parker and his father died when Harry was just 15. Throughout the movie we see Harry fall further and further from the path he wanted for himself until one day during a fight between this universe's Spider-Man the Scarlet Spider and this universe's Green Goblin, Harry gets caught up in the danger and when trying to escape the Goblin gets him and threatens to kill Harry if Scarlet-Spider doesn't surrender. After thinking about it Scarlet-Spider attacks the Goblin and Harry is killed. Harry later wakes up with a giant mark on his arm resembling a spider bite. Harry looks over to see Scarlet-Spider lying dead on the ground and when Harry takes the mask off of him Harry sees it's Mayor Peter Parker but in his final breath Scarlet tells Harry that he is a clone of the real Peter, the Goblin. Later that day Harry realizes that he now has spider powers too and decides to become the new Scarlet-Spider, that is until a portal opens, and he falls through.
