There's a bunch of projects with licensed worlds around. Dresden Files. Atomic Robo. Mistborn. Lord of the Rings. Warhammer.
Where is the Malazan Book of the Fallen? Where's Night Watch? Where's Thundercats? Hell, I've only seen a fan-made Avatar: The Last Airbender. Is there a reason some of these properties are deemed worthy but the others aren't? It annoys me.