Once upon a time, fandoms lived in living rooms, school cafeterias, or small comic shops. Friends would debate storylines, argue about plot holes, and speculate about what might come next. Today, those conversations have moved online, scaling up from small circles of friends to global communities of millions. Platforms like Reddit, Discord, TikTok, and countless fan forums have given fans a voice louder than ever before. And at the center of this culture is one of fandom’s most fascinating phenomena: fan theories. These imaginative interpretations and predictions have transformed the way we consume stories, turning passive viewing into active participation.