So a while back i made a thread about how Kishi foreshadows almost everything that is major in the plot, which can be read
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. Anyhow, based on this logic i believe Naruto will become hokage based on the fact that throughout the series he repeatedly said "How can i become hokage if I can't even save one friend?". I believe that this foreshadows a conversation between Naruto and Hashirama in the near future where Hashirama will discuss with Naruto about he himself was not able to save Madara, yet he still had to protect everyone else in the village. This does not prove that Naruto will become hokage, but it does support the idea.