I have been wondering since the last Narnia movie if they were going to continue on with the series. The next few books (in published order not chronological) don’t feature the siblings people have become familiar with–or their cousin from the last film.
According to sources it was possibly going to be the Magician’s Nephew but the Silver Chair won out. As far as I can tell, no official casting has been noted although the voice of Aslan from the previous films will obviously be there.
It will be exciting to see how the do this next film, and it makes one wonder if they will continue with the book series till the Last Battle? When more information on filming dates and casting come out, I’ll do an updated post on this topic.