Naruto's final power up?

[MickNerks]

Naruto surpassed hashirama when he combined sage mode with bijuu mode.

And the 3 databook states that kurama's power is to great to be fully suppressed which means hashirama can suppress some of his power but not all of it. And lets not forget that naruto has acquired the power of the other bijuu's which we haven't seen yet.

 

[shadowcb]

The answer is simple. Uzumaki sealing jutsu. Naruto is an Uzumaki. They are known and feared for their sealing jutsu. Naruto has showed us he is skilled in sealing jutsu. He proved that at the beginning of his latest training section with his knowledge and skills using the kyuubi seal.

All Naruto needs now is a sealing jutsu he can use directly in battle.