I'm here to say it is not!
The tiếp theo movie will be The Magicians Nephew.
Source: link
link
cáo, fox (instead of Disney) decided that they will be skipping the Silver Chair and just going on to the Magicians Nephew.
I am very sad that the Pevensie will not be there.
I think another reason they are doing TMN is because many people say it is their yêu thích book after LWW.
cáo, fox is hoping that TMN will have a better turn out than the Voyage of the Dawn Treader.