CC hit the nail on the head. Maduro is actually referred to properly as a plant priming in Cuba. It is the top or Corona leaves on the plant and they are extra fermented. That is why the EL usually as such a nice and rich flavor.
That said, what you are reffering to are actually the names of seeds. When Cuba does open up, I would imagine new growers might experiment with Cameroon, Sumatra, or Connecticut grown in Cuba, but most likely things will continue as they are today.
Cuban cigars historically used two seeds when growing, Criollo (mainly used for filler and binder) or corojo seed (mainly yields the wrapper). Over time these seeds grew susceptable to diseases like blue mold and black shank. Today, these seeds have been engineered to resist disease and the main seeds are Habana 2000 and Criollo 98. Corojo is very seldom still used in Cuba but is in some instances. That seed is commonly reffered to as Corojo 99.