Both would be far too expensive to add to Royal Caribbean or any cruise ship. Not to mention the license with Disney for Hamilton. Wicked's licensing rates will be skyrocketing with the movie coming out.
Wizard of Oz is about as close as you'll come to a new 'broadway' show. While it may never have appeared on Broadway in that form, it does have an incredible 16 piece orchestra that makes the show reminiscent of Broadway. A live full orchestra really enhances that production. It was the license with the Baum family that required the orchestra and I'm so glad it does.
Typically shows that make it to any cruise ships are not the top tier shows. Mamma Mia, Cats, Grease, Saturday Night Fever and Hairspray are the current shows. Older and cheaper to license. Hairspray is the best of the bunch for me, they really do a great job with that show. The only 'new show' to appear on a ship recently is Beetlejuice on NCL Prima, but that was only after NCL gutted most of their broadway shows.
Fortunately Royal Caribbean does a good job with their original shows, but they tend to lean more heavily into tech than story and song. Princess is probably the best at developing traditional original broadway style shows. But then they work with Broadway producers to create some of them. They're probably the most underrated shows at sea.