Okay, this is purely my opinion and 你 can totally ignore this, but if you're interested, listen up!
日本动漫 have been known to be different from their original manga. Some changes are not major, some change the direction of the story completely. Usually, such changes arise at the ending of the anime. Think about most anime:Soul Eater, FullMetal Alchemist, KWMA, and a host of others, their endings are usually different from the manga. And when 你 compare these endings to the manga, the 日本漫画 endings are (usually) much better.
Due to the never-ending suspense 火影忍者 is giving us, many 火影忍者 粉丝 have gone ahead and read what happens at the end, and many are pleased with it. But if 火影忍者 (the anime) follow the path of other 日本动漫 and alters the ending...well 你 can guess.
This alteration is not expected though, as while major changes are made to 日本动漫 from the beginning, the 火影忍者 日本动漫 has only gone through MINOR changes. All we can do is 交叉, 十字架 our fingers and wait in anticipation, hoping that the worst does not come to pass.
Again, JUST my opinion!

*You can find the differences between the 火影忍者 日本动漫 and 日本漫画 at the link below:
naruto.wikia.com/wiki/Anime-Manga_Differences