For me personally, the only things that technically aren't Muppets are those things made by The Creature Shop that are based upon another franchise (namely the TMNT & SW), for even Dark Crystal & Labyrinth are tied in with the Henson name, whereas Teenage Mutant Ninja (or Hero) Turtles is copyrighted to the TMNT comic creators & those various people who've made the TMNT cartoons (both the 80's & 2003 versions) and the Star Wars saga (even the parts with Frank Oz manning the Yoda puppet) is copyrighted to friend of the Muppet family, George Lucas.