You remembered The Simpsons episode, "A Fish Called Selma" of where there is a Broadway musical based on Planet of the Apes starring Troy McClure playing as Taylor? If they ever did made an actual Planet of the Apes Broadway musical, especially likes the one on The Simpsons, it would be an insult to the Planet of the Apes franchise, mostly to the classic films from the late 1960's and early 1970's. The original 1968 POTA film was not a musical at all, Taylor hates Dr. Zaius and the movie did not have a happy ending at all because Taylor got angry when he finds out that the Planet of the Apes was Earth the whole entire time at the end of the original movie. This part of that Simpsons episode shows great disrespect to the entire franchise, mostly to the classic films. I hope they will never make a musical based on Planet of the Apes, ever. Maybe a straight play, but never a musical and also never an opera either.