That would be awesome, to see him in the (hopefully) upcoming Muppet series. I think he had the time of his life up there with the Muppet gang, and I just have a feeling that he'd have a hard time saying no to doing some more future Muppet projects.
Seriously though, how cool was it seeing a fellow Muppet fan getting a phone call from Kermit, and then getting to sing with him, and getting all that special attention and encouragement from the Muppets? You could just see the excitement radiating from him, and I don't think that excitement could help but transfer to some of us fans watching. I'm a big Terry fan, and can't wait to see what comes down the road for him now!