I seriously doubt it. The Tolkein family wasnt really warm to the idea of the LOTR or The Hobbit books to be put on film. JRR himself didn't think that what was in the book could be properly translated onto film.
However, he had sold the rights to the both of those (why, I dont know) - and therefore putting them on film was out of his control.
The Silmarilion however was published posthumously as a collection of unpublished histories & stories edited/arranged/finished by son Christopher. The family refuses to give up the rights.
Plus - it would be near impossible conceptually to be done as a complete book.
My friends and I are huge Tolkein fans, having picked it up from my best friends parents & their friends. Now my friends' kids & some of their friends are picking it up.
Several of us went to midnight showing.
Movie was awesome, as a fan. (We watched 2D) We did not go in expecting it to be like the book. (Good thing.)
I’d say it would be nigh impossible to do the Silmarillion.
It’s not an easy book to read, and it covers tens of thousands of years. Very complex.