Originally posted by wakkawakkawakka
Well at that time Orochimaru coming back made sense considering that was the main body that Sasuke had supressed using his own chakra. This version of Orochimaru that was inside Anko is just a weird Horcrux. Which is weird since it would make Orochimaru nigh unkillable in sorts.
Being around forever is sorta his thing. taking over bodies and what not. But, he has to have people have his curse seal, so it is limited.
But it would've been better had he not just popped up like a genie. Also if it was kind of similar to the Uchiha Hideout incident, then wouldn't Orochimaru have been able to come back in either Anko or Kabuto just as easily when they were out of charka.
I had originally had this same question. now that I think about it, this is different. He needed oro dna in this current revival from kabuto, since this was not his main "self". Had Kabuto not been around, I assume this wouldn't have been possible.