although I couldn't put my finger on why. I could have picked it up at Wal-Mart for five bucks, and yet I didn't. There was something about the packaging and the ads I'd seen that made me think "This isn't a Muppet film. This is a kids' movie by people who think they know what kids like" and I didn't know what made me think that way.
Until a few minutes ago, when the answer struck me like a lead brick: Color.
In most, if not all, Muppet productions to date, it has been much easier to ignore the fact that the characters are fairly brightly colored, felt objects, because of the surrounding color. The Muppet Show took place in a dimly lit theater, with dark burgundy curtains serving as Kermit's introductory backdrop. Sesame Street is, for the most part, dark grey. Fairly subdued, real-type places. The Muppet Movie ranges the gamut, but it always takes place in real locations, with no bright colors added for the sake of bright colors. And that's what was missing from (at least the promotional portions of) this movie. It seemed like they were aiming for kids because nothing seemed real. Including the grass. Including the swamp. None of it seemed like it was even *attempting* to be real, and so it was difficult for me to take it seriously enough to even desire to watch it.
It might be a good movie. I don't know. Maybe I'll learn different sometime.
But for this Muppet fan, it was just asking for one unbelief-suspension too many.