The movie promotions and trailers I can forgive until May... there's NO way Diz would have had anything ready by Untangled, and they could have only got away with a Teaser by Tron 2, but they were filming at the time. And it's foolish to think Diz will start packaging the trailer to any movie less than Pirates or Cars, since... well, let's face it, how many people are going to want to see a nature film?
Movie or not, the Muppets is a long lasting franchise, and merchandise pops up every now and then. The funny thing is, the Smurf blitz started up as soon as news of a movie popped up... all the way back when Paramount was supposed to release their trilogy (why why why didn't they do their version? WHYYY! ?) and inconsequential Smurfs stuff started popping up. I don't see why self standing products like more shirts, a couple small toys of Kermit only, and all that is completely out of the question.
I'm sure once SS is on break, we'd see them film something new... but we need to keep small bits of momentum rolling.
That said, the only movie I'm really worried about is Arthur Christmas. It looks dreadful, and 8 times out of 10, people will flock to a BAD Christmas movie to get fake holiday, let's buy crap spirit. They are getting worse, they're often trope filled, and thankfully they cooled off last year... but the Star power of the Muppets better outshine another "I'm an independent thinker that no one understands" kiddy film.