Disney swept them up not long afterward. We probably couldn't have gotten them anyway because Disney would've outbid us. But I've often wondered what might have been.
Jim Henson had been in negotiations for quite some time with Disney. Henson’s untimely death simply put everything onto the back burner, but the Disney agreement was already laid out for the most part. So, the Japanese didn’t miss out on anything.
Muppet-manga?