I love this show.
For those familiar, I've always believed that Little Finger will ultimately either end up on the Iron Throne, and/or save the day, in an epic plot twist. This trailer beginning with his voice saying, "fight every battle, always, in your mind," is another epic quote from the character that, for me, continues to foreshadow the bigger picture.
My crazy fan theory is Verus and Little Finger have always been in it together, and when everyone least expects it, they will ultimately take control. The show (and books, obviously) seems to always have characters in the shadows rise, and often out of no where. It makes great plot twists, and I think that will be the ultimate twist in the end, with the two masterminds of the show ultimately ruling the day.
I have nothing to prove this, just a hunch.
Game of Thrones returns to HBO on July 16th.