I wouldn't be surprised if this was just NGS2 at 30fps with gameplay-altering enhancements/costumes. And the missions would be the same, except that there is no co-op and you're stuck with the AI. Color me cynical, but this is Hayashi's "Team Ninja" we are talking about.
I hope it is like the 360 version and tons of enemies come after you and its easy to cut there limbs off but keep IS Ninjas as easy as NGS2 cause when there were tons of those bastards, it was impossible kind of.
GT: Yami Anubis X I believe that is it 3DS FC:1891-1173-7323 Name YamiAnubiX