THE CRUISE INDUSTRY IS IN SUCH BAAAAD SHAPE.....
It all remains to be seen whether or not these larger ships will saturate or enhance the cruise industry.
Don't forget the "cruise industry" we "usually" are referring to is those lines and ships cruisers from North America are most familiar with. As we saw elsewhere, there are dozens and dozens of cruise lines worldwide, many of which folks never even heard of. They wind up with some of those older ships...and from what I read, the cruise industry WORLDWIDE is booming.
So I doubt the cruise industry would become saturated. Having said that, I give you the history of Atlantic City Casinos, which were massively overbuilt. There were several BILLION $$ mistakes, which closed shortly after opening.
Lines will need to rethink how many super ships they need. Europe is clamping down on what ports and how many ships can visit. Guessing the Med might end up with the small-medium displacement ships.