Apparently, the heirs of J.R.R. Tolkien fell for the old "creative accounting" scam. When a studio offers a percentage of the profits, do not sign that contract! To do so guarantees that on paper, that movie will not make any money. Ask for a percentage of the gross, because there is no way they can sell tickets and not have gross revenue.
According to New Line Cinema, the Lord of the Rings trilogy of movies hasn't made a profit! And yet they still want to make a movie from The Hobbitt! How noble of them!