When composer Dean Grinsfelder was asked to score Wolverine and the X-Men he was asked to take a more cinematic approach to the music. The result is fully orchestrated, episode-specific scores that really enhance the enjoyment of watching the show.
However, where this approach fails is the show's theme song. The cinema-style score does not work as the theme to the series as the main theme is not distinguishable enough for someone to get stuck in their head, which is what you want as a theme song. And it doesn't help that the music gets lost in the loud explosions, grunts and other sound effects.
Past X-Men theme songs have has a great melody that set the tone for the series. And while the theme to Wolverine and the X-Men pays tribute to the X-Men themes of the past, it doesn't do enough to get you pumped about watching the show.
What this theme song has going for it, however, is an excellent animated sequence that showcases each of the X-Men and their abilities.