User blog comment:QueenBuffy/Game of Thrones Season 4, Trailer 1 is now Here!/@comment-4084711-20140113030951/@comment-5014364-20140113031246

The dragon shadow is just an artistic flourish for the trailer. First, they're not that big even by this point in the story. Second, it isn't very spoilery to say that Daenerys does NOT return to Westeros at this point, nor do her dragons.

Margaery's hair is special because that's her wedding to Joffrey - which is why everyone is gathered around for the ceremony.

Yes that's Needle, I recognize the hilt.