even here on tumblr when the doujinshi was reposted you can see it was still posted 1 year before naruto chapter 698 came out. you can read the full doujinshi here https://t.co/QedRrvqW1X
1. "by my side" was released in 2012 and was inspired by naruto shippuden ED 20, yet managed to predict naruto and sasuke's final valley fight's conclusions frame by frame in many instances. you can see the date when it was posted on pixiv in the second pic