Movie very much reminded me of The Muppets
Just the little things like rebuilding the theater montage reminds me of the fixing up the theater from the Muppets. And the theater starting empty but filling up as the show goes on. Even the show itself had a variety show feel even with the just singing. And of course the "save the theater" plotline is similar in general to the Muppets.
I enjoyed the movie, but left feeling I have seen it before, and better.
I reject your reality and substitute my own-Adam Savage