kym

Maybe when Naruto and Sasuke were fighting Kabuto and Madara came out of nowhere knocked out Sasuke and released the Kyuubi from Naruto, then Naruto tried to confront the Kyuubi (that's how he got those claw marks on him) but he was feeling too weak. Kakashi and Sakura saw from far away that the Kyuubi was released.

So at the end Kabuto and Madara are leaving with the Kyuubi, Sasuke is waking up and thinking about going after Madara and Kabuto (maybe smiling because he got another Sharingan boost), Naruto has those scars and Kakashi and Sakura think Naruto died.

I loved this OVA but at time there's something I don't like, it seems like too much spoiler and even though in the manga the outcome of the fight might be the same I feel that the chances of the scenes being the same are very slim. Too bad because I don’t know why but I really really liked the scene after the fights where it went from Sasuke on his knees looking at Naruto to now Sakura looking at Naruto in the same position.