lol, as many kages and hokages and grand hokages and master hokages as we have, there's no freaking way that there'll be enough countries... unless you consider any land within a ten foot radius with at least two people on it a country... =P
not to mention, there can only be one specific Hokage...
Thing is, this game... it can only handle so much. Sure, it'd be cool to have Genin tests and Chuunin exams, and somehow learn the way to ANBU and Jounin ranks... but at the time... I'd say it ain't happening...