With the release of Nigerians we saw something unprecedent in this game: a culture with the ability to create resources. I'm sure that after the Nigerians we are going to see more cultures with similar abilities. I think Brazil is a nice candidate for a similar ability, and it would make a lot more sense than the one we already have. Brazilian history is marked by the emphasis on monoculture for exportation. Throughout it's history, Brazil had different cycles in which a specific commodity was the most profitable in the overseas marketing: sugar in the early modern era, coffee in the industrial era, and soy beans in the modern era. I think you could incorporate some of these in Brazil culture trait.