Here's the thing though, it doesn't matter what a creator intends for his creation, it is how the public receives/perceives it. If the public doesn't accept it, then no matter how much the creator screams for it to be taken how he intended, it will never be.
No matter what he says, this movie will always be a tacked on retconn after the end of the manga. That wil never change. If he didn't want it to go that way, he could have required the movie to be released before the end of the manga, then the epilogue chapter could have come after.
However, we know at least a little of how Kishimoto feels by his determinedly confusing and vague manga ending. If someone chose to read it as Lee being the dad and Karin being the mom, then there is more than a little visual evidence to support that.
In the long run, the manga is what lasts. In bookstores, libraries and in private homes. The Last will not hold any more sway than any of the other movies do over the manga. Remember The Lost Tower, The Blood Prison? Yeah they have nothing to do with the manga. They barely register in memory, and no one talks about them.
It's just a shame. But this movie is so divergent from EVERYTHING Naruto ever stood for that's it hard not to wonder if Kishimoto really had much of hand in it at all. Except for signing off his approval and collecting his checks. Time will tell, I'm sure.
Out of likes, but this x1000. Kishi can talk all he wants about this being canon, but it is a giant retcon that destroys many of the characters we have come to love.
I still can't get over the depiction of love he is showing through Sakura.nonce you love someone as a little girl you can't give that love up? Love built on a bench scene between Sakura and Naruto? Preposterous and insulting.