Game Of Thrones Season 6: 11 Things You Missed In The New Trailer
10. The Three-Eyed Raven Watches The Tower Of Joy
We get another shot of the Tower of Joy in the trailer, with an unknown soldier being stabbed through the chest. It's someone on the Stark side who is getting killed here, and since Ned Stark and Howland Reed are the only survivors, that means it's one of Lord Willam Dustin, Ethan Glover, Martyn Cassel, Theo Wull, and Ser Mark Ryswell.
Anyway, that's not the important bit here. What's more intriguing is the shot we get of the Three-Eyed Raven, played by Max von Sydow, surveying a green battlefield. This tallies up with what we've seen of the Tower of Joy, meaning that we're seeing Bloodraven witness these events.
If he's seeing them, then it confirms the belief that these flashbacks are one of Bran's visions from the weirwood tree.