I'm not totally sure if this is true or not. But the article does look pretty legit from Film.com. The article states that Joe Johnston is planning on retiring after directing The Silver Chair. Can anyone else confirm?

Here is the link: [url]https://www.google.com/url?sa=t&rct=j&q=&esrc="s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwi9ubHRo-fYAhUpqVQKHfJGBW0QFggsMAE&url=http%3A%2F%2Fwww.slashfilm.com%2Fjoe-johnston-retiring-after-the-chronicles-of-narnia-the-silver-chair%2F&usg=AOvVaw1QC1mH17JwIXLmGETJHXTc[/url"]

I also found this article by SCREENRANT.com as well. It confirms this story as well. [url]https://www.google.com/url?sa=t&rct=j&q=&esrc="s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwi9ubHRo-fYAhUpqVQKHfJGBW0QFgg4MAM&url=https%3A%2F%2Fscreenrant.com%2Fjoe-johnston-retire-silver-chair-narnia%2F&usg=AOvVaw0WVcuaOO-q6M_kd-6EFwmx[/url"]