I think the best analogy for this kind of copying is our article on Star Wars opening crawl. We don't include an actual reprint of the text. We include whatever information there is around the text. We might even summarize the text, but we don't repeat the text, not even with a word or two changed. That's how we cover something encyclopedically without getting into copyright issues. Admittedly there is some stuff written about the Narnia timeline. I don't think it's enough to warrant an article, and I don't think it justifies copyright violation. I'm interested to see what a resident copyright expert would say though.