This.Both. First of all they are going to extend Naruto with fillers for a very long time then continue with the next generation. However at same time they're going to release a movie or probably movies. What those movies are going to be about? Honestly I have no clue but you can look at SP's previous Naruto movies and make a safe assumption about their quality. Considering that they are revisiting the RTN universe, I wouldn't be surprised if they make another movie with that universe with burrito, probably butchering everything that we've loved about Road to Ninja in the process.
Because that's how they roll.
For the new gen movie, most likely it will use the same recipt like naruto previous movie. You know mission, damsel/dude in distress, movie exclusive heroine, and variety rasengan finisher.