The promo was very mystical and nice done. Also season 3 started to focus more on the main characters which was a lack of season 2 in my opinion. I hope they continue with more screen time for the main characters and also don't forget about the recurring ones. It's always a difficult task with so many characters but Game of Thrones can do it I'm convinced of it.
As for Dany I hope we'd get to see as much as possible and even if we don't the few scenes will be brilliant, I'm also convinced of this.