what? how could they not cover it? its the first arc in the whole show
This is what IGN said from the demo they played at GC:
In terms of mission structure too, Ninja Storm looks intriguing. As you progress through story mode you'll gradually unlock multi-episode mission arcs. These are based on the first five story arcs from the original anime and include the Genin Training Arc, Chunin Exam Arc and Chasing Sasuke Arc, from what we had time to scrawl down during publisher Atari's demonstration of the game. Each arc consists of multiple missions, all ranked at different difficulty levels, to maintain the challenge throughout the game. From what we could tell, winning criteria range from fighting specific characters to defeating opponents using a certain number of lives. There's seems to be a little more variety than that though, with CyberConnect2 demonstrating a particularly spectacular boss battle to close the presentation.