The 4th Hokage has returned after several years of traveling amongst the lands of 'normies'/non shinobi, studying the culture of those who live without chakra.
His goal is to find a compatible Female Uzumaki who can carry on the Tori Summoning Contract/become the Head Miku to Tori no Kuni (Land of Birds). This is to preserve the 'contract' the Tori Miku Lineage holds with the 'divine messenger' Yatagarasu, a 3 legged crow of lore. The original Tori Miku was an Uzumaki, hence why Tomi seeks one of their clan who might be compatible genetically.
However not all of Tori no Kuni wants to have the Tori Miku lineage restored as they hoped it would have died out with Tomi. (He holds the blood of such/it's a long story but has been established in his biography for some time) Hence there will be a civil war in the Land of Birds. Those who support the revival of the Tori Miku to power, and those who greed to contain their current status quo.
Both factions will vie for contracts with the various Hidden Villages to fight in their civil war to determine the fate of the Land of Birds. This might involve the assasination of the potential canidate, the destruction of the Divine Gate Lineage Scroll (A blood contract which permits the summoning of Torii as a powerful artifact), and what not.
http://narutoprofile.wikia.com/wiki/Kuchiyose%3A_ToriiI still need to brainstorm and come out with some in character reward for those who might be involved on either side of the civil war. It has to be appealing to join both factions.
I'll need to get things sorted out/multiple people involved in the brainstorming phase/moderators to regulate it and such. More or less, think of it as potentially being in a Naruto Movie/Filler Arc. The purpose is to write a compelling, interesting story whom the players determine the outcome with their character's various actions and so forth.
Here is the link to familiarize yourself with the Land of Birds Lore I created.
http://narutoprofile.wikia.com/wiki/Land_of_Birds