From the overall looks of things this movie will make some money but not some great amount. I just have this feeling that even though Sasuke is popular and is an easy cash grab of sorts by giving him more screen time, he will never truly be viewed as the hero by the majority of the fanbase. Naruto was their hero but his character was destroyed and a lot fans didn't like it. So even if they do try to elevate Sasuke or Boruto into the hero's mantle it just won't stick, not with the fans that grew up with this story. That's why I think they would have to draw a high number of new fans to offset the number of fans they lost. And I just don't feel that will happen.
Of course there will always be the diehard Sasuke and Hinata fans around. Along with the casual fans who are just entertained by the visuals and could care less about the story to help keep the Naruto franchise afloat. But I think that's all it will ever be, afloat. Just treading on top of the water. Making just enough money to keep going until they finally tire out and drown. Well, hopefully that's what happens.