Experience Tumblr like never before
I just discovered TV Tropes' Wild Mass Guessing page for Arthurian legend. If you haven't read it, check it out. It's absolutely wild. For example, we have...
The theory that Merlin stole Kay’s powers
The theory that Guinevere is sterile segueing into the theory that Arthur is a cis female segueing into the theory that Arthur is Mordred’s mother segueing into the theory that Guinevere is male and Lancelot is gay
The theory that Guinevere wasn’t a historical figure but Arthur and Lancelot were (and Arthur was female)
The theory that Arthur has already returned and its possible Arthur subtheories (Winston Churchill, the Duke of Wellington, Queen Elizabeth I, Prince Harry, Sonic the Hedgehog…)
The theory that Merlin is John the Apostle
The theory that Isolde is Tristan’s mother (ick)
The theory that all versions of the legends, medieval and modern, are retellings by different characters
Also, TV Tropes is a wiki, so you can add your own theories to the page.