What is there left to do? Naruto is having his final battle with Sasuke, Kaguya, BZ, Madara and all the puppet masters of the series has been defeated there's nobody else that should be a realistic threat.
Yet we keep getting hints at one more story arc after this one.
-Postponing Naruto's title of hokage by giving it to Kakashi
-Hagoromo stating that Naruto will automatically summon the spirits of the bijuus if he ever needs their help
-The whole world peace thing
- what to do with Orochimaru and Taka runnin around