I believe The Witches was also in development at the time as well.
Yes, I remember seeing Him was executive producer in the opening credits. Though I think it was completed by the end of 1989.
Also in 1989 Jim was working with the original Teenage Mutant Ninja Turtles movie and I guess there was a lot of conflicts behind the scenes with the producers and filmmakers against Jim and his Creature Shop because the animatronics kept braking down. According to a Kevin Clash interview that was made by ToughPigs, Jim was very happy the film succeed when he read the paper but he got a rude phone call or something with the filmmakers being nasty to him about how angry they were with the animatronics. And when the Creature Shop worked again on the sequal the producers at the begaining of the movie said "In Memory of Jim Henson" which got Jim's family upset because I heard Jim didn't really like the movie itself because he felt it was too violent for a family audience or something like that.
And of course all the deals with Disney buying Jim Henson Productions. I've heard that in the 80s Jim and Bernie were thinking of buying Disney because I guess they weren't doing so good during that time or something.
Though it seemed like after Jim's passing there was The Muppets Celebrate Jim Henson and that was it, everything else has basically on hold until 1991 in which the company mainly focused on Dinosaurs and then The Muppets returned with The Muppet Christmas Carol.
Anyone heard the story of how Michael Eisner kept bugging Jim about buying the Sesame Street Muppets and it got Jim ticked off to the point that while they were at dinner with Joan Conney (Because Jim wanted her to come just to give a final no to the idea of selling the Sesame Muppets if he brought it up) So Micheal said with a smile "So how about Sesame, huh, get The Muppet family together as one" and Joan noticed Jim's face turning red with stress and Jim said bluntly to him "You see, there you go again. We said no, can we please drop it?"
So I guess there was a little stress between them though I still wonder if Henson was owned by Disney and if the deal was finalized, what would differ from what we have today? Would Henson Alternative exist?
Also around Jim's final years when he was interviewed and even winning awards he was becoming more strong opinionated in terms of how television and film was becoming an influence to the audience. He would mention how the medium can be used for good but it still hasn't reached it's penitential. And now people need to be aware what they are putting out there. Which I found quite interesting.
It always seemed he was decades a head of his time. Like in Handmade Video he was predicting indie film and what became internet video today. Also in 1982, in an interview he was already not only talking about cable tv, but HD widescreen television like what we have today. AMAZING!
I think Jim also did a magazine advert for a Japanize Color TV once in the mid late 80s too.