Kyuubi ain't no pussy dude.. he has a plan. And btw; why would you let yourself be controlled for the third time? Kyuubi is coming from the erea of Juubi and SO6P.. Kyuubi has always been representing " Evil " and the most powerful, hateful bijuu of the Nine beasts.
- It's true that Naruto told him, that he simple has to wait.. for bringing peace and all. But Kyuubi is a selfish prick and he simple waits for the right moment to strike. You see; what can Naruto really do for him?
Just like any other animal creature, they simple like to be FREE. Just like Gaara's bijuu reacted, when Gaara went too sleep. But we all know that Naruto can't let him be free. Naruto will DIE, if he does that.
The only similarity of being " Free ", is going to be like; Killer Bee's friendship with his Bijuu. Naruto can't erase all that hatred out of the Kyuubi, better said:
IF NARUTO CAN talk Kyuubi out of his hatred leaque, naaaaaaaaaaaaaaahh... then THAT would be, my ONLY disappointement of Kishimoto.
Kyuubi HAS TO stay " Evil ". Besides; The savior of the world, the 4th Rikudou, Naruto Uzumaki, the one who united the villages and became Hokage with having control over the most hatred, evil bijuu in Naruto World... NOW THAT'S what I call " Completion ".