Remember what happened last time in the Valley? Madara landed the final blow on Hashirama, leaving him laying on the water. What happened afterwards? Madara got stabbed.
I betcha Naruto is a clone and he'll probably hit Sasuke from behind before the latter delivers the blow, leaving him temporarily paralysed, most likely.
I betcha Naruto is a clone and he'll probably hit Sasuke from behind before the latter delivers the blow, leaving him temporarily paralysed, most likely.