I noticed that in the info for each of the Muppets (besides Walter), it mentions one movie with each character plus mentioning "TV's 'The Muppet Show'". And the choices of which movie to mention is odd. It mentions Muppets from Space for Miss Piggy (and that's one of her worst movie roles), The Muppets Take Manhattan for Gonzo (I figure that one has the least amount of Gonzo out of all the movies), and Muppet Treasure Island for Animal (he's only on-screen three times, has only one line, and isn't even listed in the credits... That's like having a bio on Rowlf and only listing The Muppet Christmas Carol as one of his movies).
I think I might have figured out something about the ending... It's just a guess, but if any fans who saw the movie already see this, please don't confirm here (I don't mind if you tell me via private message). But this article says that Tex Richman (hey, I think this is the first time I wrote his name here!) hasn't been able to laugh since he was ten... I think the ain't it cool news review mentioned something about the fart shoes having a payoff... I wonder if the fart shoes actually make Tex laugh.
EDIT: But I expected Tex to be the kind of villian who needs to get defeated and humiliated in his defeat. If he ends up laughing for the first time in a long time, that might defeat a need to humiliate him at the end.