I would be more interested in seeing a movie or mini series on Tolkien himself and the other Inklings, especially C. S. Lewis.
It could explore the reasons behind creating LOTR and TLTWATW.
Yes, a sentimental, nostalgic yearning for a once pastoral, albeit apocryphal, idyll, like latter-day Miltons. Luddites or Arts and Craftites but with an underlying far more important, to them, reason as well.
While a railing against the Miltonesque ‘Satanic Mill’ ugliness of post industrial revolution Britain is certainly a palpable feature of their work, Tolkien and Lewis were, by their own admission, primarily motivated by their perceived need for the English people to have their own origin mythos. Like the ‘real’ Celtic mythologies possessed by the Irish, Scots and Welsh with whom they have shared the British Isles since the 6th century.
That need/motivation has long preceded the industrial revolution with attempts by medieval English writers to gradually convert the eponymous hero of the last major Celtic cycle, King Arthur from being a figure who fought against the English invasion into King of the English himself.
Given the similarity of their goals, the difference in approach from Tolkien and Lewis becomes all the more facinating.
Tolkien seems to envisage a marraige of Germanic (Scandanavian, e.g. dwarves, trolls) and Celtic (e.g. the De Danaan-like Elves, Celtic free will ethos) with a need for associated languages of a non Germanic origin whereas Lewis envisages a mainly Celtic-like slightly surrealistic/supernatural overlay (with some classical mythological overlap) imbued with a strong Christian ethic.
It is a story worth telling and handled correctly could make a good movie or mini series I reckon.
CGI addictions could easily be catered for by interjected scenes depicting the protagonists’ thinking processes.