Recently I saw the Sing-Along video Things That Fly, where the main plot is that Kermit and Lindy want to help an alien get home. But throughout the video,as Kermit and Lindy look for ways to get her back home, she doesn't seem to be with them much, only popping up randomly in many of the musical numbers. I would have thought we'd see Norberta with them more when they learn about the things that fly. Heck, I kept wondering if the ending would be similar to the Bugs Bunny short 8 Ball Bunny, with the aliens home actually being on earth (but it looks like she does live on another planet, though her mom picks her up in a car as they head to a space station or something).
Lindy seems similar to Walter (when I saw the covers for Muppets on Wheels and Things That Fly I thought he resembled PJ, I wonder if they reused the same puppet), not to mention Scooter. I kinda feel Robin would have been better for this. But this reminds me of The Nostalgia Critic's review of A Muppet Family Christmas, where for some reason he says there's a reason they replaced Robin with "orange you", showing an image of Walter, who I don't think is too orange or a replacement for Robin (and we have seen Robin since). In my mind I've kinda wondered if he was actually thinking of Lindy, though it's doubtful Doug Walker would have watched a Muppet sing-along video.
The back cover was recently posted on Muppet Wiki, and I noticed it said the video features "your favorite Muppets" (I can't really remember if it says "all your favorite Muppets"). So they're assuming Kermit is our only favorite Muppet, or that Lindy was many peoples favorite (did Muppets on Wheels sell REALLY well?), since it doesn't really have any other familiar Muppets. Steve Whitmire is the only core Muppet performer in this (having come before Bill Barretta started to get his own characters), but I wonder if they were all busy or if they chose to just leave them out. I have kinda wondered if other familiar characters would have fit, I kinda feel that the scenes with the kids could have used Fozzie, Gonzo, Rizzo, Robin, Bean Bunny, and maybe Animal, Bunsen, Beaker, and The Swedish Chef. I feel it might have been odd to see other familiar characters just appear as passengers on the plane (well, odd without them interacting with Kermit), but maybe some fairly obscure/fairly familiar characters (like The Newsman or Lew Zealand) could have been there as extras.