"Which reminds me of a fanfic I was one toying with for Supernatural, with the brothers investigating the disappearance of children, and discover the source is an old wardrobe... that was once owned by C.S. Lewis as a child. The current owner is selling children to the other side in exchange for wealth/protection/something."
Of course, if you tried that, Aslan would be *pissed*.
I once heard a story that Lewis himself was a bit upset over the send-off he gave Susan, so in another of his books, there was a character fans believe was an adult version of Susan, and things didn't end that badly for her all up.