User blog comment:Relikz/Sorcerer Magazine, Issue 24: December 2013/@comment-24016459-20140104171417/@comment-2214433-20140105153054

I thought Mashima had stated that he picked the names of countries randomly, so he'll focus the story on Fiore only. And sure, there was the statement of 'minimum of 3 arcs left', but who knows. Things may change.