I think it's very possible that Brazil could arise as a super power. It is the fifth most populous country in the world and they seem to have a stable democracy going on. Brazil also has an abundance of natural resources given its large land area and the fact that much of that area is covered in rainforest. Brazil also has a lot of influence in Latin America so it is possible that they could build a strong coalition in any international negotiating.
To quote something I heard once, but can't remember the source of: "Brazil has the potential to be a major power, and it always will."