Yeah, unlike the usual filler stuff where it's believable that it could have happened between the canon events going on in the actual series, there's no way that the stuff that took place in the last five part filler could have taken place.
Why?
1. Naruto is able to unlock his nine tail/super saiyan like cloak in the final battle.
2. His seal mark is completely gone on his stomach at the end of the ordeal.
So yeah, this was basically a mini movie in a way, especially with how they did the credits as well.