Hello! First-time poster here, but there's just so many thoughts that I needed to let out in a safe place
Maybe I'm being overly optimistic, but what if Naruto and Sakura are in fact together in this movie and that is why Hinata feels so bad about doing nothing but watching the whole time, so she decides to give Naruto the scarf as a way to get closure for her feelings, but she asks Sakura for permission first, and that is why Sakura is shown reassuring her, since Sakura would know that Hinata wouldn't have bad intentions or try to steal Naruto away from her. Just an idea...
Welcome to H&E, and your prediction is actuaally good