They aren't reviving the hokages, they are traveling to the 'heavenly plane' to meet them.
@ Knowledge God: I hope you feel like an idiot now. Everything you thought was completely wrong. Maybe next time, you won't sit here on the forums with your idiotic arrogance and insist that you know what's going on because it's 'logic.'
1. It was great to get a glimpse of Orochimaru's true power.
2. This chapter was a huge key into understanding what's really going on with Orochimaru.
- The cursed seal that Orochimaru uses infuses the person with his chakara, which then acts as a tether to keep his soul within this realm of existence, so long as that person stays alive.
- During the fight with Itachi, Orochimaru's soul escaped being sealed by Itachi within the little snake, which DID end up dying. Since Anko was the only person left with Oro's seal, his soul became tethered to it within Anko.
- Orochimaru has complete control over his soul within this world and is literally immortal unless he's sealed.