I'm guessing that you are taking about the 50th one right? And I'm also guessing that you're talking about that Pepe studio thing. Well I have the frist Muppet Movie DVD myself, but I do have the 50th Great Muppet Caper, and I'm thinking that, other than a few preveiws, that yes that is all there are for extras.
For my money, I say the frist release is better. I loved that camera test with Kermit, Fozzie, and Miss. Piggy as an extra, better any day. That beats the Pepe stuff hands down, not that I have anything against Pepe.