Bigger Battle Climax in Prince Caspian?

Knight of Gondor has passed us along an interesting rumour from a reliable source. He says, “Following the duel between Miraz and Peter, there will be an all-out assault on Miraz’s castle by Narnian creatures. This will reportedly include ’mice running through the halls’. Evidently, Adamson has sought a larger climax for the film than just the duel, which is okay by me.”