I'm confused. Jim Henson created and owned the Muppets, until it was sold off to Disney about five years ago.
Why would Walt's name be in front of the Muppets movie title? Walt never had anything to do with muppets. And he certainly never had anything to do with muppet movies that were rated PG for "Mild Rude Humor". Walt didn't go in for rude, it wasn't his scene.
Movies that come from Walt Disney's studios in Burbank, namely his feature animation and other family fare, still bear the name Walt Disney Studios. Pixar is 400 miles north of the Walt Disney Studios, up in Emeryville, and it's operated by John Lasseter. Thus, a Pixar movie wouldn't have Walt Disney's name in front of it, as it's not his studio.
There is still a Walt Disney Studios and suitable movies made by that studio bear the title Walt Disney Pictures. For instance, the upcoming movie
John Carter that is released in March, 2012 bears the "
Walt Disney Pictures" logo that some folks seem to feel is important in its official preview now in theaters.
http://disney.go.com/johncarter/?int_cmp=WDSMP_MoviesCat_NewUpcoming_ComingSoon_Intl#video So
Walt Disney Pictures still exists, and it's a brand still applied to movies that warrant it.
I know that if I worked for Muppet Studio, I would be kind of peeved to see Walt Disney's name slapped on my movie. The corporate Disney logo, as the company owner and distribution arm, is something different than putting Walt's name on a product and company he didn't own.