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If you haven't read that^ thread yet.....I highly suggest that you do! Then come back here to ponder this question.
Or just read this following summary: Basically, Turrin B has theorised through some extremely awesome and legit reasoning that Shikkotsu Forest is the residual plain of the Death God himself from the Reaper Death Seal. How he came to this conclusion, you will have to read the awesomeness to find out.
And after reading his thread it seems more than likely to me.....that's the place Sasuke will seek his answers from the spirits that roam that plain, spirits that have been consumed by the Death God.
So it's only natural for Orochimaru to want his arms back right? So I was just wondering if such a thing occurs, who will be sacrificed in exchange for Orochimaru regaining his arms? Suigetsu or Juugo?