Since 2016, Disney repurchased the film rights for Prydain Chronicles, and no further announcement was made. probably shelved.
Considering....
Disney is doing the stand outs, the well knowns first: the crown jewels of the Disney animated feature canon for movie theaters and Disney+. However, some of the lesser, obscure and cult films of Disney's animated feature canon don't seem to make it to get the treatment.
Here a storyboard pitch reel for a live action Prydain film by Jared Crossley and Justin Kunz pitched to Disney.
cool.
The animated film may be a cult classic, there are those who think The Black Cauldron (1985) improved over the books, others say it's not a good representation of the books.
As for me, I'm admittedly torn between the two.
Even though the story was rushed, I love the 1985 animated film still has a place in my heart since the early 2000's when my dad first rented that movie from Blockbuster video.
I would love to see more movie adaptations of the books, if true to the books and done right.
Presented here are some pages from the Walt Disney Productions Annual reports from 1974 and 1975.
You can see in these pages that The Rescuers (1977) was in production
and both The Fox and the Hound (1981) and The Black Cauldron (1985) was in early preparation.
As for The Black Cauldron's script development, Rosemary Ann Sisson is mentioned to have written the film's script. (It makes me wonder, how does her early script compare to Lloyd Alexander's rejected script and the final finished film?)
and what is also interesting is that The Black Cauldron had a different title: The Cauldron.