I think a rather convincing theory somewhere that would explain both naruto's scratch marks as well and madara, to put it simply, they said that after fight between them madara came for the kyuubi and took it from a weakened naruto, the kyuubi may have attacked, plus the kyuubi being removed could explain why sakura thought he was dead, but being an uzumaki he survived, i dunno in the end, inguess we'll just have to wait and see what kishi pulls outta the hat next. Even so the narusaku moment was brilliant! hope it is canon
Wow i havent in quite a while, i've just seen the new ova and i'm speechless, animation was fantastic and the narusaku moments were awesome. i cannot wait for this to happen in the manga