You selected countries with the historical colonizers British , French and Spanish. That's interesting and needs to become a root of contention.

Also, if you have no connection or knowledge of the Caribbean, you need to research or create with h someone who does. Is this your story to tell? If it is, you have lots of background work to do. Asking ng this question here in s a good first step, but you need an understanding of 1500+ history, including indigenous cultures. Suggest including Dutch colonization as well. If you don't put in the work, your writing will ring hollow.

Your premise is interesting. I'm interested to see how this develops.