I do kind of agree with the consensus here -- that the 25th Anniversary Edition isn't that good -- but I do, for some reason, like it. I mean, sure, it shouldn't have been released after the Collector's Edition, implying, on Sony's behalf, that it is a better version, but it isn't that bad when you look at some other releases. The Coen Brothers' "The Big Lebowski" was re-released as a "Special Edition" which contained no discernible differences to the regular edition, aside from a sky-rocketed price tag. I do not have "Labyrinth" in my collection so I can only speculate from what people have said here, and reviews of it, that it is much the same - little features compared to previous releases. I do think that, at some point, all Muppet films should be released again in one boxset, or at least individually, with a lot more bonus features -- reflective documentaries, directors and casts that are fans of the Muppet films speaking about their greatness, etc. But, until the day that either they are released, or a 50th Anniversary of each is released, we'll just have to cut our loses and accept the features we have.
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"Come on, bear. Burn rubber." Kermit the Frog
"This is a narrative of heavy-duty proportions." Dr. Teeth
"We picked up a weirdo..." Fozzie Bear