hey guys sasuke doesnt come back to the village cuz if u see the very last movie when it comes out it will show u bcuz he fights naruto one last time and they kill each other if u read the manga u will find that out read chapter 486 in manga and it tells u
Most of that is careless assumption and careless assumption alone. Sure, there's opinions and hunches from characters within the manga/anime/movie/what-have-you that Naruto and Sasuke are destined to fight, and I'm more than positive that will indeed happen, eventually. I even have my own hypothesis of how things might turn out in the end. But that doesn't mean that any death or banishment is definite. Naruto himself pushes hard to disprove the effectiveness of his village's black-and-white, "someone has to be sacrificed or nothing" type of outlook on a dire situation.
No one but Kishimoto is certain if whether Sasuke is permanently banished from the village and/or anyone dies in the end. Hell, even then, he may just surprise himself by the life his own creation develops as it progresses along. I'm sure there were characters Kishimoto created who he initially didn't care for in their beginning, but as they developed their personality, flaws, and conflict more, they became more and more likable. It's very common to an author/artist.
So I suppose the point I'm trying to make is that nothing's written in stone just yet. Or if it is, it's kept within a small circle of Kishimoto and the people who work for him. So who are we to hastily swear by otherwise?