They use product placement tons of times. Such as, ''Geico, so easy a sea monster could do it.'' They are seen eating Subway numerous times and Eustace yells ''Where`s the beef?'' I almost forgot about Caspian and Edmund`s Mac or PC discussion.
Oh! Oh! Oh! I've got it! The Dawn Treader itself is ALIVE...because it is a TRANSFORMER!
Can it be a lightsaber instead? And not just any one, she weilds Darth Maul's double balded lightsaber.
Besides the fact that that would completely destroy the movie, storyline, and everything else associated with the movie, that would be AWESOME. I can already see Lucy using the force to attack some random enemy that is nonexistent in the book(excluding the slave people, since she was captured too).
I don't know where we could fit this into the movie at all, but we could have a scene, possibly at Deathwater Island, where someone is about to push someone else into the gold water at the point of a sword. The person about to die says: "This is madness!" The other person says: "This is Narnia!"