Originally Posted by
DarthEnder
See, thats the point I'm not entirely agreeing with. Since the 3rd used the 4th's sealing technique on Orochimaru, we know that you can use the technique to simply take the target with you to the Underworld rather than just sealing him up. If the 4ths only goal was to protect the village from Kyuubi, he could have dragged it with him to the Underworld. Obviously on some level, he also wanted Kyuubi to be used as a weapon by the village. Granted, that weapon is for protecting the village, but if his only goal is stopping Kyuubi he didn't have to seal it inside Naruto.