At the D23 Event tonight, it was announced that the Disney Cruise Line fleet will be adding ANOTHER 4 new ships to the fleet, bringing them to a total of 13 ships by 2031.
With 5 in the current fleet, and another 4 currently in the works (Treasure, Adventure, Destiny, and unnamed OLC ship for Japan), adding another 4 between 2027-2031 is very aggressive growth.