Harry Potter

Harry Potter: There's a theory that J.K. Rowling is actually Rita Skeeter who was exiled from the magic world for reporting lies. She is so angry about being exiled that she decides to write books revealing the entirety of the magic world to the muggle world. To her dismay, the Muggle world believes her stories to be fiction, but she becomes rich and famous anyway. Of course, this theory also involves the real world and is therefore way more far-fetched than other fan theories.