It's been 2 years and 4 months since The Voyage of the Dawn Treader set sailed on the big-screen and in the present time, there is no Narnia 4 film yet (even a development, production, cast, script, etc are still in scratch). There are many disagreements between two parties: Doulgas Gresham wants to make The Silver Chair next but Walden Media wants The Magician's Nephew next. So here's my opinion on which book they should adapt and film next.

As all other book/comic based movies do, Narnia is no exception to have a different storyline, theme, etc from the book. Here is my overview about the differences of Narnia between the books and the films. 

Box Office records of the first trilogy: “The Lion, the Witch and the Wardrobe” was brought to life to the big screen last 2005 by Walden Media and Buena Vista pictures and it was a great success being one of the block-buster films of 2005. “Prince Caspian” was also brought to life to the big screen last 2008, with the same production team, Walden Media and Buena Vista pictures. Both of the first two films were directed by Andrew Adamson. The third film, “The Voyage of the Dawn Treader” almost didn’t make to the silver screen. This is because Buena Vista dropped the franchise due to the low box-office of “Prince Caspian”. But many thanks to 20 th Century Fox, for they saved the franchise. Because of this, “The Voyage of the Dawn Treader” was released last 2010 in breath-taking digital 3d by Walden Media and this time, with 20 th Century Fox. The third film was directed by Michael Apted.