I went to see Winnie the Pooh today and finaly saw a Muppets trailer in the theater. There weren't many others watching, and the movie didn't get much response (I didn't hear any laughing until after the trailer ended).
I don't think it's been mentioned on the forum, but the trailer in front of Winnie the Pooh is a bit different than what's been seen. It starts out as the teaser trailer, but the second half shows several different clips, including some not shown previously. The only one I really remember is a recreation of the part of the opening with the full-body monsters, and yet Timmy Monster is absent (I think I spotted an empty arch where Timmy should have been). This means I'll be surprised if Timmy shows up in this movie.
I've pointed out that some of the archs seen in other trailers are empty, and some have speculated that either some were erased from the trailer to avoid spoiling a surprise or have speculated that the editing of that shot wasn't finished by the time the trailer was put together. But I'm pretty sure all the monsters were on set for the part with the monsters, and there wouldn't really be any reason to avoid showing Timmy Monster (unless he works for the bad guys as well, but so far we don't know that).