When Naruto finally 'surpasses' Yondaime by creating the new Rasengan, do you think we'll see a small arc where Naruto's heritage is revealed by Kakashi or Jiraiya? It would seem like the most opportune time to do it. It could also prelude into Naruto gaining yet ANOTHER new teqnique...Flying Thundergod maybe? Just a thought. The whole Yondaime connection thing HAS to be explored at some point via Kishimoto, and what better time than after he 'perfects' his supposed father's technique?