Disney is addicted to acquiring properties. From Pixar to Star Wars to Avatar , they've got some pretty high-profile brands in their wheelhouse. Unfortunately, there is one Disney property that has been so underused it's almost criminal. I'm talking, of course, about our felt friends, the Muppets. Disney acquired the Muppets in 2004, and they haven't done squat with them since! Sure, we got the 2011 movie The Muppets and the less successful sequel Muppets Most Wanted , but you'd think they woul…