Wow. That is a staggering amount of work you've put in really brilliant. Especially the renderings.
Personally I listen to all this music almost exclusively having essentially given up on pop music and this attraction would be wonderful to see for me.
I love love the theme that Condor Flats would take and think they should do it like that regardless of if this goes in.
Now for the criticisms...(sorry if I'm overly critical ) I just don't know if this would be exciting enough. The other AA shows (all of which are nearly gone a shame) have for the most part have fantastical ideas with singing animals or historical figures. This does include historical figures but I don't especially think Judy Garland has as much historical significance as Abraham Lincoln.
Realistically this would be a huge huge investment for the company to make for a ride system that isn't as popular as it used to be using musicians that most guests have never heard of.
Regarding the ideas and the theming. You are as always a genius when it comes to this. Having a restaurant in a spinning theater might be slightly problematic for some guests (my brother threw up after having dinner in the Space Needle and this spins much faster) but in all is a great move. Having that many of Mr. Lincoln type AAs would be awe inspiring. The architecture is perfect! I especially like the new entrance to Soarin. Also having the actual show platform rotate makes much more sense than having the theater rotate.
Good good ideas.