Originally Posted by apacolypz
Personally....IMO I don't see his coming back as an ass pull. We just never understood the curse marks enough to know how easy it could be. The ass pull was the mask....If Kishi would of made finding the mask a little more difficult and actually throw hints as to what it could do throughout Part II..it would of made more sense to the readers. We all knew Anko was going to be used for something of great importance. We all knew since Kabuto stated Oro's chakra is within the curse marks....it was childsplay to deduce that Oro could possibly return. Having someone like Tsunade search for the mask while also Naruto searching for Sasuke would of been the ideal way of introducing the mask and it's importance to the Edo Tensei. Though Kishi decided to go the idiot route and have Oro find it in some abandoned shack.....Tsunade searching would of been perfect since she is a descendant like Naruto of the Uzumaki clan.
Going back...so Juugo already gave Sasuke some Sennin mode chakra...that chakra somehow forced the six Zetsus to come out of Sasuke's body. A little confused as to how Sage chakra would force out hashi's (weak-Zetsu) chakra? Maybe the chakra was too potent for Zetsu to control. We know it is difficult to absorb sennin chakra as we saw in the battle against Pain.
Also we keep forgetting Oro has half of the required material to awaken a body like the sages. He has Hashi's weaker body of Zetsu which was enough to strengthen and maintain control over Tobirama. All he needs is the dna of an Uchiha.
The way Kishi decided to bring Orochimaru back creates a whole lot of mess to be honest. If Orochimaru can simply be brought back by syncing up his flesh with the chakra he embedded within the cursed seals, what's to stop the possibility of dozens of Orochimaru's being hypothetically created, after all, Anko and Sasuke were just two of the many that held his cursed seal mark. The principle itself just makes things goofy and without boundaries.