If the show airs on ABC, I don't think we'd get Disney Channel stars at all because they're two wildly different audiences. No adult is going to turn on the Muppets because some person their kid likes is on the show, and with a pilot being filmed for ABC, 18-to-35 aged viewers are the main goal, not 12-to-18. If there are young-skewing guest stars, it'll be people like Shailene Woodley and whichever Hemsworth brother is the younger one, who both adults and kids have heard of, not 2015's Hillary Duff.