If someone is a lonewolf for is country, She/he is champion
No, i supose that minimum of 5 players is enough, but in the list that i've seen till now, there're more people in some countries that in anothers, for those (it dependes how many join the tourney) it will be more difficult.
I gess, to be more fast this tourney, 2 games are enough (PL & FNU); and then is just a question to make some publicity (in the chat/forum).
Make a poll in forum just to see how many players will join it.
I gave the seed, someone give the earth & water & sun