Originally Posted by Uchiha Barles
I'm thinking the 90% figure they were talking about was that, 9 out of 10 people who got the cursed seal couldn't handle it, and then died. Meaning, anyone who didn't die, was compatible for it, and wouldn't have died in the first place. So 90% is just a compatibility rate that Orochimaru measured during his experiments. That would mean Sasuke can in fact get the cursed seal again, or survive having his own flesh meld with Juugos, or whatever other cursed seal/juugo power up related thing kishi might through at us. Makes sense to me, as much as anything else in this story anyway.