Following the success of Prince Caspian, Walden Media have taken it upon themselves to make a third Narnia movie based on C S Lewis's book "The Voyage of The Dawn Treader"
Here is a little article telling about where the film will be mostly shot:
"As you can imagine, the next film in the Narnia series, The Voyage of the Dawn Treader, will require quite a bit of ship-side filming... and so, much of the film will be filmed at the Baja production site where Titanic was filmed.
"In fact, the plan is to make Baja the home base for the production, and then do a few location shots in Australia, and perhaps New Zealand.
"Michael Apted will be directing, with filming due to start in January 2009 for a May 2010 release."
The film is based on the water so will need to be shot in a more exotic setting.