It's easily forgiven if an older movie lost any BTS/edited footage. Remember, they pretty much threw it all out most of the time. The only reason to be disappointed if it didn't make it onto the film is if Henson has that old footage and never bothered to give it to Disney/Disney didn't bother to ask for it. Yes, the special features are pretty light and there's no reason why there shouldn't be commentary. But on the bright side, those who don't have or want a Blu-Ray player and have any copy of the original one won't feel terribly left out.