Earlier this week HBO unveiled the first trailer for “A Knight of the Seven Kingdoms”, its second “Game of Thrones” prequel series at New York Comic Con. Based on George R.R. Martin’s novels, the series is set 100 years before “Game of Thrones” and 72 years after “House of the Dragon”. It follows Ser Duncan “Dunk” the Tall (Peter Claffey) and his diminutive squire, Egg (Dexter Sol Ansell), as they navigate a Westeros where the Targaryen dynasty still holds the Iron Throne and the memory of the l