You think Game of Thrones has fan theories? That’s cute. Nowhere’s got fan theories like the galaxy far, far away. (I blame Supreme Leader Snoke, but that’s just my theory.)
Many of these theories currently concern the notion that there is more than one Jedi in The Last Jedi. Director Rian Johnson keeps shooting that whole thing down — Luke is specifically named the last Jedi in the opening crawl of The Force Awakens, he notes. This ancient, lightsaber-twirling, Force-filled order has no other official adherents, and Luke thinks it must end.