I'm joining the majority here.

The Silmarillion would not work as a movie. It would be difficult to pull off as a TV show. We don't need more Middle Earth movies.

Also, Peter Jackson has pretty much ruined The Hobbit. Not only did he vastly overextend the story beyond the scope of the kid's book it was, but he inserted his own horribly out of place elements to pad it. He changed the tone, characters, and world.