Status: Partially True
The Hound is definitely back, but it turns out that he never actually died — and since trials by combat have been outlawed by King Tommen, it’s unlikely that he’ll face off with the zombie Mountain this season.
Original Theory: A cryptic hint from actor Ian McShane indicates that he might bring fan-favorite Sandor Clegane, The Hound, back to life during season six. Given The Hound's long-standing beef with his brother, The Mountain, this could very well mean that both resurrected brothers battle it out in a glorious, long-anticipated fight sequence nicknamed Cleganebowl by hyped-up fans.
