It is important to note that film rights for "The Lord of the Rings" and "The Hobbit" were acquired separately from the rights to "The Silmarillion." Therefore, any potential movie adaptations of "The Silmarillion" would require different negotiations and agreements with the Tolkien estate and other rights holders.
Currently, there are ongoing film and television projects set in Middle-earth, including the upcoming Amazon Prime Video series "The Lord of the Rings: The Rings of Power," which takes place during the Second Age, thousands of years before the events of "The Lord of the Rings." However, these projects do not directly adapt the events and characters from "The Silmarillion."
Given the rich and expansive nature of "The Silmarillion," adapting the entire work into a single movie may be challenging. It would require significant effort to condense and condense complex histories and mythologies while doing justice to the source material.
However, it is possible that future film or television adaptations could draw inspiration from certain segments or characters from "The Silmarillion" and incorporate them into other Middle-earth-based projects. Ultimately, the decision to create a movie adaptation of "The Silmarillion" rests with the rights holders and the willingness of filmmakers to take on such a challenging endeavor.