The more I hear about the possibility of NH happening the more I realize how absurd it sounds.
Hinata just wouldn't make Naruto happy in the way Sakura could, especially after all that's happened. Sure, Hinata had touching moments with Naruto, but they don't affect Naruto's view of Hinata beyond gaining respect for her.
Naruto's love for Sakura is always constant. And if the last perspective we had about Naruto was how he bluntly said that Sakura was his girlfriend I would find it ridiculous that you could skip to the epilogue and show him just randomly loving Hinata. It just sounds too absurd.
And I do think the final epilogue of the manga will be something that happens after "The Last" since we should at least see Naruto becoming Hokage. Kishi said some time ago that he had the end of the manga decided and just needed to figure out how to get the story there, so we should be expecting a definite ending within the manga and not this "to be continued in the movie" stuff that has been talked about.
"The Last" might be canon, but in no way is it needed to understand the complete story of Naruto. It's just an extra story.