This remains one of the craziest things that's happened in the SNS fandom
You can read the full doujinshi here.
There's the possibility Kishimoto saw this doujinshi, since it was published on Japanese art platform Pixiv, however that doesn't necessarily means he copied it, after all he said he'd been planning this chapter for 15 years, even before serialization of the manga started. Nevertheless it's proof of SNS shippers having such deep understanding of Kishimoto's writing, unlike the rest of the fandom, this person in particular was able to predict panels of Naruto and Sasuke's eventual reconciliation.
It's possible the artist realized one way or another Kishimoto would reference Haku and Zabuza from the very first arc, giving us a full circle moment
















