Stories, by design, generally leave out details to better serve their narrative direction. These missing details leave it up to the audience to fill in the blanks with their own imaginations.
Leaving it up to the audience has given rise to countless popular fan theories over the years. Most of these theories are a bit of a stretch, to say the least. However, sometimes they are almost as brilliant as the story they are reinterpreting. They may even make you rethink the way you thought about the entire film or TV show.
While there are a huge number of fan theories lying around on the Internet, these 10 are so good they might as well be made canon.