I really hope that isn't true.
It would be a massive waste of time, in my opinion, if the developers spend time making fancy focus trees for country like Haiti, Honduras, and Nicaragua meanwhile important countries like Canada, Australia, India, and even Japan have very primitive and basic trees.
Personally, I wouldn't buy such a DLC if it included central american countries. The only country of note worth playing in all of Central America already has a focus tree: Mexico. I would also remind people that central america specifically refers to the region between Panama and the southern US border.
I DO think a DLC that had countries like Brazil, Argentina, Columbia, Venezuela, and/or Peru could be decent, but beyond that? I don't see much added value to the game, in my perspective, when there are much more worthwhile things the developers could be doing with their time. Again, many of the oldest focus trees and reworks are pretty inadequate by the standards of the newer ones we have gotten.