From Chap 328, I believe the next Hokage is probably going to be Shikamaru. Naruto will most likely be a "Jiraya" type character, an extremely strong fighter but not in any leadership or subordinate role.

As for the "King" piece Asuma mentions, it is most likely Naruto.
What is the King piece in Chess? its the one piece that if is captured or lost, you loose the game.

If Akatsuki captured Naruto, the game could very well be over as they would capture and extract the most powerful known demon. Not to mention Naruto is already an extremely powerful Ninja representing a significant portion of the Konoha's firepower.