I have not looked at all the links here (although I'm grateful they were posted on this thread) because I don't want to get too spoiled.
It looks and sounds great, which is good because I was worried this new movie/special was going to be more kid-oriented when I heard the plotline for it.
I've honestly LOVED each and every one of the Muppet movies and specials over the years (even Oz, despite how weak it was compared to all the others).
It does seem to be the first movie since the original three that has everything the fanbase as a whole is looking for. Favorite Muppets (both old and new), totally original story instead of an adaption or homage of books/movies (MFS was an original story, and I personally loved it, but it was missing the original songs that fans had come to expect over the years), and new original songs!
MFC, MCC, IAVMMCM were all excellent, and I think that this will shine just as brightly as the rest of them.