ASOIAF fan theories: Cleganebowl (1/?)
'It is largely believed that Ser Robert Strong, the mysterious and silent knight who is the newest member of the Kingsguard, is actually the reanimated corpse of Ser Gregor Clegane. He will be Cersei's champion in her upcoming trial against the Faith. A less likely but still popular theory is that the large gravedigger on the Quiet Isle is actually Sandor Clegane, who abandoned his persona as the “Hound” to live a new life. The Cleganebowl theory states that Sandor will be chosen as the Faith's champion in their trial, and therefore finally have the opportunity to fight his brother, Gregor'.