The Magician’s Nephew may be the next Chronicles of Narnia book to be made into a film by Walden Media and Fox. While The Lion, the Witch and the Wardrobe did well at the box office, both Prince Caspian and Voyage of the Dawn Treader had disappointing returns.
The Magician’s Nephew is the sixth book in the series, but is a prequel to the series, so it makes sense to take it out of order. Besides, it is one of the more popular books in the series.
At this point, it is just planning. No one has been found to write the script.