In the earlier seasons, 2 new countries where added each new season, but now it has been a while since new countries where added.
So probably at some time there might be new countries when a new season starts. And mostly even GMs don't hear this before it is announced in the news, so it's possible there will be new ones with the new season, but I would guess there won't be for now...
They are not your friends; they dispise you. I am the only one you can count on. Trust me.