Yes, the Walt Disney Company bought the Muppets in 2004, so therefore Disney does have the rights to the Muppets.
Yes, Disney announced in April 2012 that The Muppets 2 is currently in development.
Yes, when Disney acquired the Jim Henson company, the Muppets were integrated into the parks. Their most prominent appearance is at Muppet Vision 3D at Disney's Hollywood Studios.
The Walt Disney Company owns the Muppets.
No, it was Jim Henson.
Disney Game On - 2012 Muppets Most Wanted was released on: USA: 12 February 2014
Walt Disney
yes
Walter is the newest Muppet. He first appeared on Disney's The Muppets.
Kermit and the Muppets Behind the Ears Disney Channel Preview - 1998 TV was released on: USA: 1 June 1998
No. The Muppet Movie was produced by The Jim Henson Company (then known as Henson Associates) and ITC Entertainment. When Disney bought the Muppets in February 2004, the rights of the movie were transferred to Disney, and they released The Muppet Movie under their company logo in 2005.
The Walt Disney Company and The Jim Henson Company announced on February 17, 2004 that they had entered into an agreement under which Disney would acquire the Muppets and Bear in the Big Blue House properties from Henson.
Disney owns all things Muppets.