As unlikely as the event may be, I cannot help but observe that if the stars were aligned (or messed up like a Shake 'N Bake in the hands of a maraca player) in such a way that made LotR seprequels a reality.... well.....
...Then they should look no further than Barrow Downs RPG players for the scriptwriters. I mean, come on, where are you going to find more dedicated and talented writers who know how to stick to canon and be imaginative about it? I get exhausted just reading the
titles for some of the stories. It's the epitmoe of being dedicated to Tolkien-canon but not closed to the idea of quality fanfiction renderings. I'll write you a recommendation if any you wish to apply. (Do they expect credentials from the recommender? Do I need a recommendation to recommend?)
I'm not really serious.
Because personally, I would get quite sick of sequel upon sequel upon sequel, even if they were well done or were even based off the Silmarillion. It's not the movie itself, it's all the hype, commercialism and discussion that surrounds it. I can't imagine a future filled with LotR movies to worry about! (And anyway, I see moviemakers wanting to go ahead with made-up sequels instead of chosing a Silmarillion prequel format, since for ideal commercial appeal, you would have to use many of same characters from the Fellowship over and over. Mainstream audiences will be more willing to watch a tale about Legolas than, say, "Beren what's-'is-face". While we would be interested in the Silmarillion, other people might say, "So when is Aragorn gonna show up?")