This OVA was release in the begining of 2011, and it shows the future Naruto Sage vs Sasuke. The battle between them appears to be at the ending of the Shinobi War, where only Naruto and Sasuke stand alone, fighthing.
Characters like Kakashi, Sakura, Kabuto and Madara also appear in this OVA.
I've found this clip in one the sites i usually download anime, and i couldn't just ignore it!
This clip shows the preview of the epic battle between Naruto and Sasuke! It shows a bit of the path both took to reach the present point, and it gives the spectator an excitement feeling of whats to come :p
Kakashi, Sakura, Kabuto and Madara also appear a little in this OVA.
Hope You enjoy it ;)