I don't know. I think he has been working on developing a video game of his own, and he's probably doing the music for that. (He said something about an announcement next month.) Or maybe they wanted a more techno sound for the show? I don't know. I was really hoping for some new tracks like Letters of Transit or The Singularity is Upon Us for a "futuristic" kind of score.
I'm really sad about this! I was so excited to hear him create a new musical world.