Board Thread:Naruto Discussions/@comment-29752445-20161017202331

I just read the page of sasuke a little bit and I am curious about a certain part, what's the source of the following paragraph: "Years later at the time Naruto became Hokage, Sasuke was investigating Kaguya within her sand dimension.[61] During his investigation, Sasuke comes to suspect that she created the White Zetsu Army in order to face some greater threat. He returns to Konoha, where he tells his hypothesis to his wife and the five kage at the summit being held. Not wishing to cause a panic, the Kage agree to keep this to themselves for the time being. Wanting to safeguard the future of his daughter and the new generation, Sasuke continues his wanderings as he tries to find more information, using his Rinnegan to inspect other dimensions. "

the title of it is "epilogue" but I can't tell where it's from? is it from one of the novels? 