I think the scroll is the way to undo seals, Orochimaru still living within bits and pieces of anko and Kabuto will be able to come back. Another Edo will be preformed with the Hashirama comming back to fight Madara.
They were just clans back then. There wasnt really a village. Just clans fighting for land. To end the war from killing themselves they called it good and formed a village --Konoha.