Making Arthurian Movies Based On Other Sources

I've seen the "Mists of Avalon" and tonight I saw this version of "Merlin" for the first time. I've enjoyed both; however . . .

When it comes to books that retell the Arthurian legend, my favorite is T. H. White's "The Once and Future King" (which was really 4 novel-sized books combined into one huge volume.) "The Sword in the Stone" was the first book, which Disney turned into a cartoon; and the musical "Camelot" was derived from the rest of it.

But the book had so much more detail and so many more characters than could be possibly have been included in "Camelot." Now that huge block-buster movies have been made based on "The Hobbit" and the "Lord of the Rings" books, I continue to wonder why the books from "The Once and Future King" haven't been made into a series of big budget movies or a major TV miniseries.

Seeing how many fans there are who love "Merlin," I wish that "The Once and Future King" would be revisited by someone who has the vision, the skill, and the money to create these books for the screen.