Every show closes eventually. Would reaction to this thread have been different if it was labeled "Predict how long these shows will run?" Because you have people suggesting that some of these shows will run for another 20+ years. Wondering how long something will last isn't morbid, and it's not rooting for its failure. It's curiosity. And sometimes it's just a matter of wanting new blood on the stage. That doesn't mean you want less jobs on Broadway. It just means you want different people to have a chance. Because believe me, anyone saiying Aladdin will run until 2028 isn't likely thinking about the people currently employed in and by the show--most, if not all, will have changed by then.
Aladdin - 2024 (I think Lion King has legs forever and with Frozen coming, Disney will cannibalize itself to an extent. Still--many years left in this yet)
Beautiful - 2024 (Not to pick the same year twice, but I think this will only see its stock go up if and when Jersey Boys closes and it's the one big jukebox show)
The Book of Mormon - 2022 (It's a monstrous success, but I can't see it performing like a Wicked or a Chicago)
Cats - 2020 (It's looking like a hit, but I think it will Les Mis it just because it's so expensive to run)
Chicago - 2019 (I just don't know that it has all that long left to go.
The Color Purple - Mid-2017. I think they'll get one big star after Erivo but that it will suffer beyond that)
Hamilton - 2037 (Prices dropped a lot on Stubhub when Lin left, but folks are realizing that the star of the show is the show. Settle in for a long, long run!
Jersey Boys - December 2016 (It's had an incredible run, but the numbers are barely there any more. I think we're in the final stretch.
Kinky Boots - Summer 2017 (ditto)
The Lion King - The Disney standard bearer. I don't see this going anywhere anytime soon. 2040?
On Your Feet - December 2016
Paramour - Summer 2017 (numbers are dropping fast, but unless something wants the theater, they can gut it out for a longish run)
The Phantom of the Opera - Maybe shows CAN run forever. I can't even venture a guess.
School of Rock - 2019. It'll close a hit, but with so much family AND ALW material out there...it's not gonna be another Cats or Phantom
Something Rotten - December 2016 (a show I adore that I suspect is on its last legs.
Waitress - 2019 (A show I adore that I think will have a very solid run--this all depends on casting from here on out)
Wicked - This is HARD. This is the show that I think will be most affected by Frozen coming to Broadway because it has almost the exact same target audience. I'm gonna say 2027. It has years left, but I worry that the tween female audience, while ever replenishing, will eventually be more excited elsewhere)