Siliconera: Since the Naruto series is one of Namco Bandai’s most lucrative licenses we’re positive the publisher is working on new Naruto Shippuden games right now. That game is, perhaps, Naruto Shippuden: Ultimate Ninja Impact.
Namco Bandai Games America has today announced the downloadable versions of Naruto Shippuden: Ultimate Ninja Storm Impact (PSP/PSVita) and One Piece: Pirate Warriors (PS3) are available to purchase for 50% off the original price.
Namco Bandai Games is releasing Naruto Shippuden: Ultimate Ninja Storm 2 for the PS3 and Naruto Shippuden: Ultimate Ninja Impact for the PSP – again.
The final mission has been released on the PlayStation Network.
Doubt it. If that was the case, the name would simply be Ultimate Ninja Storm 3. Looking at CyberConnect and NamcoBandai's track record, all of CC2's Ultimate Ninja series carry the same name and just move up in number. Only time they change the name is if it's an entirely new game/platform.
so no, it doesn't sound like a natural follow up to NS: UNS2