From a past "Rolling Stones" article, Jason seems as if he will be very respectful in honoring the Muppet past, especially the original "Muppet Show" characters of the 70's, which are dear to his heart.
Obviously, due to the loss of many great performers, as well as polling trends, we have lost core characters in films/TV specials over the years....hopefully Mr. Segel will honor these characters respectfully.
I would like to see Beauregard, Hilda, Mildred, Crazy Harry, Lew Zealand, Nigel, Robin, Uncle Deadly, Wayne & Wanda and Marvin Suggs. All with at least a dozen lines or so just as an introduction to these characters.