We get to see Orochimaru go all out. We hardly got to see Yamata No Orochi in action, so this is a great chance.
And I know this would never happen, but I would love to see him reconcile with Tsunade etc. Maybe even become Hokage. As it stands, I think he is possibly the most qualified Leaf Ninja (assuming he is actually good).
Again this is all hypotheticals and wishes, but I am more interested in Orochimaru right now than any of the Edo Shinobi.
Official Tobi of all Naruto boards- "I'll show you the truth!!" --Sazh > Tobi > everything else > Yuji Kaido--