Nothing to search, very little has been said about it.Would someone with better searching skills find where we talked about the Mickey ride? I was getting ready to write that up but I can't find it anywhere...
Located in Maroon Studios. General idea is that it's a tour through the soundstage where Mickey is filming one (or more) of his famous shorts. Basically a Fantasyland-style dark ride for MGM, filling a niche.
From that very loose framework, you're free to have lots of fun with the idea!