Regardless of how true this may be, now is the time to let your voice be heard. Let Disney know that Muppet*Vision 3D should stay at Disney Hollywood Studios. If you want to make a new Monsters, Inc. area, that's fine, but don't use that as an excuse to get rid of The Muppets.

I'm hearing that it's Animation courtyard, and if you look at the map, they got all that space. On top of that the parking garage is gonna be shuttered for employees and the animation building/office are barely used anymore. Muppets is insanely small and it also risks Star Tours leaving too.

I read in the Wikipedia page and it said nothing about getting shut down or being replaced

I hardly think it'll be any sort of replacement, in fact they just recently refurbished the place to be more modern with new effects and renewed seats? It was only a year ago I hardly think they're doing anything revolving around replacing the attraction!