Originally Posted by The Special One
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.
Well what made this situation unique was Kabuto being part Orochimaru and having his senjutsu. Kabuto is unlike any other of Oros diciples due to the fact he absorbed Oro and those cells were actively taking over Kabuto. Once Oro was reborn though weak he took his power from Kabuto. Even if Others hypothetically would be brough back they would desire to seek completion. It's kinda messy but not as bad. Kishi just implemented the idea way too late compared to Harry Potter who knew of the horcruxes (spl) earlier on.