Good call. You can hardly find cases where the heirs of great authors didn't simply leech off the estate, normally with little to no regard to artistic integrity.
Considering that the creation process heavily involved Christopher in that their father-son story time inspired a large part of it, one could probably qualify him as a coauthor in terms of non-financial attachment to the works.
(Oh, and Dweezil is the one who's trying very hard to maintain his father's legacy, the rest of the family is cashing in and selling out at every opportunity.)
