Princeton2 said: "Actually shows like South Pacific, King and I and even My Fair Lady may not be revived much in future. Not because of current events so much, more that their core audiences are dieing out. Similar to how shows from pre-1950 are done less and less. They are big expensive shows to put on and the two most recent revivals really didnt last that long. Outside of theatre fans, future generations of more casual theatre goers arent exposed to the classics as much. They will likely be drawn to shows that either pull on their nostalgia or have more contemporary scores. It's a shame as I think South Pacific is especially relevant now."
There is always going to be an audience for the classics, that's part of the reason why they're classics. Part of keeping them alive is reviving them. It all goes in cycles, and it works hand in hand with reinvention or sometimes even casting. There will always be an audience.
The other thing to take into consideration is the scope. Here we are talking about Broadway. The 2008 revival of South Pacific was the first production since the original on Broadway. I think that was because it is so cemented in our culture, its done everywhere, so what can a Broadway production add? Much like "The Sound of Music". There was 1 revival on Broadway in the late 1990's, and in between that, everyone and their dog see it in community theatre, and the movie. It seems to almost be better to do a big national tour, than a Broadway production.
Also, I think that a lot of the shows based on movies, we'll never see. Not that some aren't good, but I just don't see a revival of "9-5", "Legally Blonde", "Rocky", "The Little Mermaid", "Shrek", "Waitress", "School of Rock", etc.