yes. Everyone dies in the 4th movie.
It's the end of Naruto as we know it.
That's why there is a Naruto Shippuden special airing this Thursday and a 5th movie on the way.
Has it not already been made perfectly clear that as long as there is money to be made in any franchise aimed primarily at small children: the main characters can not die and that as little as possible will happen to advance or resolve the story in hopes of spinning it out to infinity?
Though, Naruto has more or less worn out it's welcome in Japan. There just might be some dying happening here soon...
click to show spoiler
The trailer is a big tease. The whole movie is about Naruto avoiding certain death that has been predicted for him in another character's vision. All the footage of him "dying" is from that vision.