Also, notice how Kermit's mouth is totally closed...a pose that is unusual for him. They have not yet been given a 'voice' through a teaser trailer, or full trailer. They are setting the mood gradually. It may have been far too overwhelming to see them all acting crazy right away; especially for some audiences who may have NEVER seen the Muppets before. They wouldn't have understood why Fozzie had a banana in his ear, Animal was tearing through the poster or Piggy was attacking her frog. Slow and steady wins the race! And when they truly come to life...It Will Be Amazing.