All of them. They said There's another Spirit Class ship, a Dream class ship, and two Excellence class ships all built within the last 10 years they can transfer over.
They aren't going to get rid of their best and newest ships. Need those to operate, get people to try Costa out. And Deliziosa is needed for the world cruise.
Yes, Carnival Corp does own all of them. They have said that they are trying to right size Costa's fleet, not deprive it. So they are doing what they want with it. Carnival Corp isn't just one cruise line.