Well I don't see how else its going to work. He broke the necklace and thus the only way for an ally to seal the Kyuubi is gone. The only person left who can possibly control the six tails power is Pain and he isn't going to give him back to Konoha, hes gonna capture him and bring him back. Naruto can't inadvertently return to a normal state on his own so that's the only outcome I see viable.
What about uchiha madara? hasn't the manga stated that he was the one who sent the kyuubi into konoha. Therefore, he whould also be another person to try and calm down naruto to a point the where he can't resist capture.