Don’t expect any Silmarillion movies any time soon because Peter Jackson doesn’t own the film rights.
You might think it to unwieldy a book to ever adapt for the screen, but what if it was a mini-series of some sort where different eras were plotted out into individual stories?
One fan is doing just that, imagining it as a three-season animated series. It’s watch it in a heartbeat. Check out his designs here: http://ow.ly/sQEWQ