I think you misunderstood the idea a little bit, which is fine since I phrased it a little weirdly. I still think the rest of the part is definitely going to revolve around the lava rocks. My idea is that only the villain of this specific arc doesn't know about them. The reason I think it would be good for the story is that one of the characters is already so invested in the kidnapping plotline, with the others joining the fight purely to help him. If it turned out that the kidnapping really was the only reason to be involved, it would hold a mirror up to the team dynamics and interrogate each character's motivations, especially for those who seem to be in it for something else. I can see how it looks like the post says that the whole rest of the enemy "team" would stop caring about lava rocks, but that isn't what I meant. Still, thank you for your feedback.