What I find weirder: It seems they couldn't make up their mind as to whether The Swedish Chef is part of the gang or seperate. He's seen with the Muppets when they enter Walt Disney World, and is with them in the swamp at the end, but when he appears serving tacos, I get the sense he was already working there. After all, he's not among the group when the guard captures the Muppets, and his part of the finale is part of a montage, appearing behind his cart but never in a group shot.
Also, Beaker isn't there at the swamp at the end. It would have been great to have seen him there with the bucket finally off his head. Bunsen's still there. Did Beaker wander off and get lost with the bucket on his head or something?
Also, since Rizzo helps the guard capture the Muppets, I would think the security guard would go easier on him, but when he captures them all, Rizzo's with them, as if he's going to be punished just the same. I'm not surprised he would betray his friends, but I would be surprised if he betrayed his friends expecting to be in trouble with them. Somehow I think they should have had Rizzo react to this, as if he'd been betrayed despite his help.
And that special seems to imply a side of Mickey Mouse we don't know. When the security guard is first seen, he's talking to a boss on the phone, I assume Mickey but can't remember. When he catches Rizzo and Rizzo brings up Mickey, the guard seems to be worried about what Mickey would do to him if he didn't catch the Muppets (and the Mickey Mouse we all know isn't a threat). Eventually the guard does catch the Muppets, who did break in without paying, but then it turns out that Kermit was an old friend of Mickey's, the guard suddenly feeling like he's in trouble, and at the end is shown scraping gum off a bench, as if he was in trouble for capturing a friend of Mickey's (who, I said, didn't pay). He did his job and didn't know they were friends, so he shouldn't have been fired for that.