Henson Productions has shut down work on The Power Of The Dark Crystal, the sequel to The Dark Crystal, which has been in pre-production for years. Apparently, animation mogul Genndy Tartakovsky has been doing work on the feature, but it is now 'on hiatus,' with no plans to restart.
In the meantime, Henson is working on an adaptation of Edward Gorey's The Doubtful Guest, which is a much more worthy project, and should be a lot of fun, if left even a little in its original format. That Edward Gorey is a pip.
Dark Horizons.com: The "Crystal" Grows Dark