Overall it's a pretty fun game. I did expect story mode to be better but if they had done everything in this game that they did in the previous two, the game's release would've been pushed way back because there's just so much in the story of Naruto to be adding every boss fight.
That's why I'm looking forward to Ultimate Ninja Storm 3. It's probably not going to be release until the anime finishes the story but it will be worth it. Probably a few less characters than Generations and it will probably still include everything after Storm 2 that Generations slightly covered (Five Kage Summit will probably be one huge boss fight, Sasuke vs. Danzo, possibly Kakashi Gaiden, the Duo of Fate fight). Overall it's gonna be an amazing game, though I don't know how they're going to incorporate the Edo Tensei summons or if they'll just set them aside and put the living version of the character for Vs. Mode and Online.