Warren Spector's blog has word the designer is working on a project in collaboration with Pixar, the movie studio recently acquired by Disney, who are also owners of Spector's Junction Point Studios (thanks Next Generation). Here's part:

Needless to say, I don’t even remember what I was going to say about GDC back in March, when I promised to post additional thoughts! Since then, my game (about which we will say nothing) has made amazing progress. My team and I have been working hard on our own and (get ready for the cool factor to go way up) in collaboration with folks from Disney Feature Animation and Pixar. If I say anymore, I’ll get in trouble, so let’s just leave it at that.