This year the telethon is in Las Vegas whereas it's been in Los Angeles in the past. That change might effect the Muppets making an appearance. Typically in years past, Johnny and Sal appear in the middle of the night late Sunday, early Monday with Bear sometimes making an appearance before noon on Monday. Kermit has appeared in the mid-morning time slot in the past as well.
Hopefully, the Muppets will be making an appearance of some kind this year though.