I don't find it canon.
I can only say that kishi sold out. The romance was handled badly, that's understandable. Naruhina, meh. But sasusaku? That's an abomination. It's like a big kitten you from kishi to the last 698 chapters.
It was easier for sasuke to go from mass murdering darkness guy to friend the it was for Sakura to give up her 12 year crush on a guy that hasn't hesitated to kill her and her friends.
Disgusting. Disgusting. But there's tons of money involved. They could replace kishi and get his assistant to do the ending that would net the most $$$$. God what a kitten ending. If kishi honestly wanted that ending, then he is a kittening hack.