Considering how the race was 100% shoe-horned in and the official explanation for them was, "They came over with Yugiri, you just didn't see them," they aren't spoilers nor are they going to be important to the storyline any time soon. The only time I can really remember them coming up at all is during the Dark Knight stuff, and even that apparently took place years ago. Raen stuff is touched on with the Ninja quests but it's nothing we weren't already explicitly told when their naming conventions were released.
Don't get me wrong, I think the design is pretty aight but they really flubbed up the introduction of a new race.
Yes, I'm a little bit salty. :<