Peter Jackson: No more Lord of the Rings movies until the Tolkien estate coughs up the rights

The Hobbit: The Battle of the Five Armies has been widely billed as Peter Jackson's last trip to Middle-Earth, but hardcore Tolkien fans have been holding out hope that one of the author's remaining books could form the basis of yet another movie set in the Lord of the Rings universe. What about The Silmarillion? Unfinished Tales? The Children of Hurin? There may be a story worth filming in Tolkien's other Middle-Earth books, but to tell it, Jackson would have to overcome an entirely new challen...