I highly doubt a movie based off the Silmarillion is going to happen, the first five chapters are about singing, and to be quite frank much of it is incredibly boring in comparison to Lord of the Rings or even The Hobbit, not to say it doesn't have it moments. But a film based off the Silmarillion would simply not be profitable enough to be a realistic option for any film production company. A tv mini-series on the other hand could work, if there were people willing to put the time and effort into it.
Finished: Too Much Love Will Kill You (working title), an original fiction novel. Working on: Second draft of Too Much Love, and the first draft of A Winter's Tale (working title).