The banner has Aslan, The White Witch and Reepicheep as the central focus, not to mention the Dawn Treader. The odd thing is that the sail on the ship is only half opened, which we’ve seen on another poster in the last year.
It also features King Caspian all of the children. And when I say all of them, I mean Eustace, Lucy, Edmund, Susan and Peter. The appearance of Susan and Peter in the banner is a repeat performance in Dawn Treader promotional material, as they’ve previously appeared in a standee. It comes as no surprise to me, as so many comments that I have seen in the last few months have been Peter and Susan related (mostly from those that haven’t read the books, and sometimes from those that have and miss the parts that mention the characters). Personally, I don’t have any idea what they’re doing in this film, outside of what I’ve heard to be very small cameos, as well as what has been reported from a screening of the first ten minutes of the film. I don’t want to know until I see the movie, though.