Board Thread:Theories and Speculation/@comment-25449165-20161013231440/@comment-24949460-20161017150202

He is a Jonin in The Last. Whatever that guidebook said was said at the time of release. Not what the author is saying NOW. Just like in DB in which we find out that Goku is now more like Superman then ever before with his origins thanks to the Minus chapter so to can this episode proclaim that Naruto gets the rank of Jonin by the events of The Last Naruto the movie. It's called retconning. Plus that episode was a canon episode so they had to ask Kishimoto on what things to add to the lore. No extra content can be approved without Kishimoto's input. Just like what happen with Kaguya arc and the ancient brothers arc. So really if the anime canon episode says that Naruto becomes a Jonin in two years then all previous data quotes are null and void as this episode was approved by Kishimoto. Remember authors can change their mind at any point. That is the power they have over there series.

So yeah as of current Naruto Uzumaki during the events of The Last Naruto the movie was rank at Jonin.