HBO has never been shy about building suspense, so it came as a surprise when the final trailer for House of the Dragon season 3 casually revealed one of its biggest moments up front. The outcome of the much-anticipated Battle of the Gullet, the centerpiece naval clash that opens the season, is effectively out in the open. Rhaenyra Targaryen wins the battle and takes over King’s Landing. For fans of George R.R. Martin’s source material, Fire and Blood , this was inevitable. For everyone else, it is a bittersweet spoiler they might have preferred to discover on screen themselves, though the closing moments of season 2 made this development all but unavoidable. The Battle of the Gullet promises to be the biggest spectacle in Game of Thrones history The trailer opens on a field of bodies, with Daemon Targaryen, played by Matt Smith, bashing enemies into the mud while majestic dragons rain fire down on a naval fleet below.…