That's what confuses me. They have 2014 listed as the release time for The Magician's Nephew which is what seems to be the normal time frame for them, every 3 years. But then, The Silver Chair is listed as 2015.
Here's the listing from IMDB:
Source:
http://www.imdb.com/find?s=all&q=narnia
21. The Chronicles of Narnia: The Magician's Nephew (2014)
22. The Chronicles of Narnia: The Silver Chair (2015)
I'll still be scrounging around for articles, stories, etc, about it.