Simply put, what if everyone really had been honest with one another?
This is a tragedy, the original world of the protagonist from the story next door, A World Without Gods.
The viewers are people who have lived through the Fourth Great Ninja War.
I'll write viewing sessions for several major historical events.
Kaguya and the Land of Ancestors: Faithful Love
The Rabbit Goddess: Guardian of the Moon
Indra and Ashura: Salvation and Curse
Hashirama and Madara: The Great Revolution of the Land of Fire
The First World War
Tobirama and Izuna: The Industrial Revolution
The Second World War
Hiruzen and Danzo: The Five-Year Plan
The Third World War
Minato's Team: The End of the Struggle
Akatsuki: The Bell of Dawn
The Fourth Hokage and His Wife: Life and Death
Sasuke and Itachi: Renewal and Decline
Team 7: Irreversible Reaction
The Chunin Exams: The Sea and Mourning
Team 7: Trust
Team 7: Three Techniques, Three Apprentices
The Land of Lightning: Rap and Undying Love
The Five Kage Summit: The Allied Shinobi Forces
The Fourth Great Ninja War: Ragnarok
That's roughly it.
Theme: Love and peace.
I knew it! When I saw the Kikyo seal, I knew there would be Abe Seimei!