Same characters, different outfits and moves, MAYBE 1 or 2 new characters. New main screen, new character select, new missions, maybe a few new stages? That's it.
Well the fighting system looks the same at the moment but hopefully they add an improved free roaming like on storm 1 but with bigger and more villages.
I haven't bought anyother Naruto Storm games after the 3rd one.
So just going to wait and see.