In all honesty the fillers will probably continue until the season is over in Japan. So the new season began a few weeks ago with the introduction of a new theme song right? So when those twenty-six episodes are up maybe then the fillers will be over.

I have no info on which to confirm my theory, I just think that now that they've finally showed time jump naruto's costume in the ending, it serves as cock tease to keep viewers enticed for the eventual start of part 2.