I just can't imagine there is that much interest in the Muppets at DLR, and can't imagine that many WDW fans flying across country just for a 15 minute show.
Remember we're talking about the same company that can't be bothered to spend $2-3M on a dragon replacement for F!, a much more popular show, and I imagine this would cost around the same. As mentioned before the show is assumed to be ripped out completely due to the theater being reused for that Frozen show at the time that needed the entire stage. So many of those AAs would likely need to be rebuilt.
Tiki at DL is full most days, especially during the summer. Muppets wasn't, especially toward the end. Lincoln might have be more comparable but even that is now likely to be more full than Muppets ever was at least initially upon return.