Articles were annoying so here's the Wikipedia section.
Lord of the Rings (film series)
The Hunt for Gollum
Lord of the Rings: The Hunt for Gollum was announced to be in development on May 9, 2024 with a planned release in 2026. The script is being developed by Fran Walsh and Philippa Boyens and set to be directed by and star Andy Serkis.
Lord of the Rings XXVIII: What's Up With Those Big Tree Guys Like What Is Their Whole Thing
The First Entwives Club, staring Diane Keaton
I would happily watch that if they'd agree to never make any more gollum media
Not gonna lie, that's one of the two LoTR stories I would gladly pay money to watch.
Is that the next spinoff?
It's a spinoff of the Lord of the Rings XXVIII extended cinematic universe. Each of the cast and crew of LotR XXVIII get a film about them.
Oh, my mistake. And then each film could have it own franchise to create the LOTR multiverse cinematic universe.