Well... I didn't find the gameplay in the first game much fun, and the amount of playable characters was very small... So I will probably try this game out before I buy it myself. If it is the same easy gameplay with just spamming your jutsus, pressing start button and get some health and stamina, then I will definently not buy Som drastical changes will be needed in my opinion.
Or they could just re think it all. Its too much like a Naruto version of Mortal Kombat Shaolin Monks but with little jutsu and only one full time playable character. The map thing reminded me too much of DBZ:B2.