According to this report, Disney's skipping out on The Voyage of The Dawn Treader. This is probably not bad news, since Prince Caspian could hardly be said to be a faithful rendering of the book. It was more like "Featuring names and a dimly similar story sort of inspired by the book." So I'm thinking we couldn't do much worse with a new studio involved, assuming Walden Media wasn't to blame for the license taken in Prince Caspian (this is not to say that I disliked the movie entirely, but it was disappointing).
I'm willing to give them another shot at it. If they botch up Dawn Treader, though, I might not be able to get over it. It's one of my favorite books in the series, right from the very first line ("There was a boy called Eustace Clarence Scrubb, and he almost deserved it." LOL!), past Dragon Island, the Dufflepuds, and the Last Sea, to Aslan the Lamb. I just won't be able to bear any abuse to this story.