Yeah, I feel bad for the guy as well. I really enjoy his stuff and he's made some awesome work, but I keep hearing about projects he's involved with that hit some brick wall or go dead silent and it's a shame to hear that. Some of the other stuff he's been developing (some I've heard updates on, others that have gone quiet) includes:
At the Mountains of Madness (which is his dream project, got into production but was then shut down due to an edict of "R rating and small budget, or PG-13 and big budget" given by the studio, but is now back on after he figured out a way around the PG-13 restriction),
A new movie adaptation of The Haunted Mansion (which at the moment he's only attached as a screenwriter and producer, but has said he wants to make it like the ride in terms of "leaving part of you having fun, and part of you creeped out"),
A stop-motion adaptation of Pinocchio (one more akin to the original story and jointly produced with Gris Grimly, a children's author known for morbid materials and creepy drawings),
And a new adaptation of Frankenstein.