Nope, well at least I didn't waste my money, each one of the games plays differently than the others, Storm 1 was amazing, the scenes, the graphics, Jutsu clashes, Free roam. ( though no Online ) .
Storm 2 was actually a bit of a failure, boss fights were the best things, graphics have gone down a bit for the XboX ( don't flame me, just watch a gameplay for storm 1 and then go watch storm 2 , GRAPHICS DID DETERIORATE) , no clashes A fast forwarded jutsu cut scenes, and a retarted "free Roam" it's not even a free roam. So yeah basically this was the worst for me.
Storm Generations, well they fixed the gameplay and improved the graphics ( now it feels more of an Anime style game ) but that's it basically , no free roam, no boss fights, fast forwarded jutsu cut scenes, and they added the best characters and fixed some combos ^^
*** To summarize the above, no one should feel like they've wasted their money, each one of the games is different and plays differently and has it's own special features.