There was an interview with Christopher Tolkien, son of J.R.R. Tolkien, in LeMonde.
It was disappointingly superficial.
First off, I have little sympathy with Christopher Tolkien's viewpoint. I think that:
(a) no author has control of his work after it is published - a right to royalties, yes, but what readers make of the work is their own choice, in the privacy of their own imaginations or in the cultural milieu. Christopher Tolkien seems to resent the playfulness of The Lord of the Rings which is part of its greater appeal.
(b) I don't like to see anyone, least of all the Tolkien estate, bilked of their legal rights. I also do not approve of the descendants of an author receiving ongoing payment for a work after the original author is dead. Christopher Tolkien may have been an editor of the books, but he did not write them. It seems unjust to me that he should feel himself due profit from movies that he did not make, did not approve of, and which he attacks at every opportunity.
(c) It seems to me from the quoted comments that if Christopher Tolkien had made a movie of Lord of the Rings it would be pedantic and boring. Makes me glad that Tolkien had already sold the rights. Didn't Christopher inherit any of his father's sense of humour and largesse?
(d) It sounds as if Christopher has made a career out of being his father's son. He would have been better off developing his own career at Oxford. Or, given that he is the Tolkien Estate and could give himself permission, he could have have written his own works in Tolkien's worlds, rather than devoting himself to the endless eyestraining work on his father's papers.