People crafting theories about films or series is inevitable. We've all come across theories, and let's face it, our initial reaction is often to consider the theorist as eccentric, dismissing their ideas as absurd ideas that will never happen in the movies. However, today's video will demonstrate why we should all give Marvel fan theories the attention they deserve, because as you'll see, many of them have actually come true. Still skeptical? Watch the video until the end and prepare yourself because your mind is about to be blown away.