Hi guys, thanks for checking out the article over on ToughPigs.com!
I can confirm that Scooter plays a role larger than the last few movies. Likewise, all of the Electric Mayhem characters have at least a few lines of dialogue each. I didn't find out anything about Rowlf, but Kirk Thatcher does like to put fan favorite characters in the backgrounds, so you never do know.
I did ask who would be voicing Scooter, but I didn't get a clear answer. Some folks thought it would be Ricky Boyd again, and some said David Rudman. I guess only time will tell on that one.
Oh, and regarding the pictures on the article, I pulled those off of Flickr, where you'll find some more great images from the shoot. Unfortunately, I'm not blessed with a digital camera, so I'm not able to use any of the ones I took until I get them developed.