But who better to fit the role, she was the only one who could now how to do this jutsu, She was concerned about Naruto giving out his chakra because of the long terms effects if would have on him, so he isn't really as strong as Kushina was because of this, Sakura said she would put her life on the line, why not for Naruto.I doubt Sakura will even appear in the next chapter, let alone have such a prominent part. o__o