I keep thinking it's weird how in the Rowdy Roddy Piper Rock and Roll Wrestling All-Star preview special that they refer to Muppets, Babies and Monsters as a new show. So the hour-long block and one half was new, but Muppet Babies had been on the air for the previous year. Maybe it was easier to just call it a new show, as opposed to saying Muppet Babies was expanded to Muppets, Babies, and Monsters with an all-new show called Little Muppet Monsters.
I wonder what would have happened if Muppets, Babies, and Monsters stayed that way, or if CBS constantly expanded Muppet Babies. Like if Marvel didn't have problems with getting the animation done on time and Little Muppet Monsters was a hit, if CBS would have expanded it to more half-hours with more Henson shows. Like what was done with Scooby's All-Star Laugh-A-Lympics, where the show was basically a number of half-hour blocks (including the usual Scooby Doo format as well as a half-hour Laugh-a-Lympics show) while additional half-hour segments would join it. Though I've read that Muppet Babies was expanded to 90 minutes one year due to the instant cancellation of the Garbage Pail Kids series. Of course I watched Muppet Babies during its original CBS run but only remember seeing one episode per Saturday (when it was multiple episodes, did they only show the opening and closing once, making it appear to be one episode to kids too young to really follow the plot and not notice a plot change?).