From the post (quoting an interview with Brooks) –
I’m doing something entirely new. It’s centered around a search for all of the elfstones that are referred to repeatedly in the other books. They disappeared in the old world of fairy, and nobody knows what happened to them. In this series of books we are going to find out. People have asked about this for years, so I think there will be some pretty strong interest in the story line.As a fan of Brooks’ work, I find this news very exciting. Now I just need to finish reading the High Druid if Shannara trilogy.