Board Thread:Naruto Discussions/@comment-26866422-20160407171305/@comment-25122992-20160409124003

Thekillman wrote: Obito could barely snag Kushina away long enough to unseal Kurama. If he had to break the seal first when at full strength, he would've been unable to do this.

If Naruto was captured and the Sharingan used against him, with time the seal would break and Kurama would be free. Or they could simply enter his mental space, remove the seal tag, then force him to give his essence to Kurama. (basically what happened against Pain, but forced to do so by the Sharingan). Pretty nice theory, but still one flaw: why did Obito have to wait for seal to be weakened by Kushina's childbirth? With his Kamui teleportation, he was almost untraceable, he could kidnap her every time he wanted to, and then just extract Kurama in some calm and quiet place where noone would be able to bother him. And still, Obito waited for seal's weakening, he even said to Kushina "You can't imagine how long I was waiting for this".