Probably Kuchiyose no Jutsu like RtN. Not that it has much better logic. :| Point is forceful extraction I think.
The fact that Naruto used Kage Bushins to save Hinata at the age of 7 ... Well, that should tell you how this movie would proceed in terms of plot coherency.
Kishimoto-sensei mentions the timeskip between Naruto chapters 699 and 700 was inspired by Dragon Ball.
Ultimately, it allowed The Last: Naruto the Movie to smoothly connect with the manga.
He should just cut off with lies. Lol There is no "smooth connection" when he has abilities which most certainly were not present in canon. Lol Smooth connection when disregarding anything but 699 and 700.
Then again; this explains everything:
The Last: Naruto the Movie will be about love. Kishimoto-sensei explains
the idea was originally from the anime producers.
Word of advice Mangaka's! Tell anime studio's to **** off when they "'recommend' canon movie material".