Last night, I found a promo for a broadcast of The Frog Prince as part of Nickelodeon's Sunday Night Muppets. In the promo, it said that Muppet specials would be broadcast every Sunday that month. Now I remember if being two months, the months of November and December 1992 (and I recall The Frog Prince being the first one shown), so that makes me wonder if the showings were so successful that they extended it by a month, or if they just decided to extend it by another month so they could show the Christmas specials, or if maybe the plan always was to show Muppet specials every Sunday for two months and the announcer made a mistake.
And if Sunday Night Muppets was so successful that they added a month of Sunday Night Muppets, then it's a shame they didn't continue past those months. There's plenty of specials they could have shown. Of course I wonder if Nickelodeon got the broadcast rights to all the specials that ended up on Muppet Matinee or if they only had the rights to a handful of specials and gained more over the course of a few months. Between Sunday Night Muppets and Muppet Matinee, Muppet specials were occasionally broadcast on Special Delivery, but every time I saw Muppet specials there it was the specials shown on Sunday Night Muppets (but then again, I wouldn't be surprised if I looked in the paper, saw Hey Cinderella, Monster Maker, Living with Dinosaurs, Tale of the Bunny Picnic, or Lighthouse Island without thinking they might be Muppet specials). And then on Memorial Day 1993 there was an 8-hour Muppet marathon, with Hey Cinderella being the only Muppet special featured to not be part of Sunday Night Muppets (Muppet Babies episodes filled every other hour). It's sort of a shame they didn't use the opportunity to show, say, The Muppets: A Celebration of 30 Years or The Fantastic Miss Piggy Show.