alright, now i'll be the first to admit, this theory is A. stretching it abit, and B. semi-half baked(perhaps even Quater-baked if you prefer). Alright. So as has been stated the Akatsuki are after Demons, more specifically 9 tails and possibly shukaku. Also as has been discussed, akatsuki does not give a damn about naruto, just what hes got sealed inside of him. So..i was kicking around random brainstorming ideas and heres what I came up with. First of all. We can assume by Kisame saying "We'll just hack his limbs off and carry him back"..that theres no need for naruto's physial form, and there MUST be a way to draw out 9tails. So this leads me to question, exactly how would one A. Draw out a demon of that power, and B. be able to harness the power. My Proposed answer lies in the Ever Unexplained, Uber Secret Jutsu: Shiki Fuujin. So, Yondaime uses this particular jutsu to seal Kyuubi into naruto, and allows naruto to draw power from kyuubi so that it can assist him in times of need. So heres what we know about this Jutsu. 1. It summons the death god 2. the user sacrifices themselves to seal the target. 3. Kagebunshin can be used to multiply the effects. 4. It was able to seal Kyuubi, the "Strongest" of the demons 5. User is supposedly sealed with the target into the user.(Which isn't true for naruto's case). so..the main questions that we need to ask are:A How could Yondaime seal kyuubi into naruto. and B. If the user and target are both sealed together, why have we not seen yondaimes soul in naruto. So I propose this interesting concept. Now, we know that the 2 souls sealed supposedly fight for eternity in their resting place. So what if, for example, one soul is crazily stronger than the other soul, lets say for example Kyuubi compared to Yondaime. Now, theorhetically, its quite possible for say the stronger soul to win, and merge the weaker soul into themselves. This would, In essence, create Kyondaime..or a Kyuubi mixed with yondaime. Now, your asking "Where am I going with this". So lets assume this "Kyuu-daime" is what rests inside of naruto. Now, It would explain why Kyuubi does lend him extra chakra here and there for no reason(for example, the gaara fight, where he had NO chakra left..and Kyuubi gave him the last bit of his chakra...I'm referring to post gama-summoning. When he has to "Wake up Gaara"...). It also explains why, despite detesting naruto and wishing for nothing more than release, he makes subtle comments about Naruto being like the 4th. This would be relevant in the fact that A. Shiki Fuujin(Or perhaps a similiar technique) could be used in 2 ways for the akatsuki's goal of getting kyuubi. 1. they assume that the leader of akatsuki stronger mentally/chakra-wise than kyuubi, and can-in essence, over power his sealed soul. or 2. the most logical, have kyuubi released, only to have someone seal it into himself. I don't know, I'm just kicking idea's around to try and find some easily speculated answers.