It's a shame that the previous ones look like, sorry for the
collaborations. Well, compared to the FAudio x Neon Genesis Evangelion collaboration, that is. Do correct me if I'm wrong, but only the headband finish and that small logo changed?
Imagine if someone were to put for example Konoha's symbol (? don't know the right term; not a "fan") on an IEM's faceplate. I know people personally that spend hundreds of dollars on action figures of their favorite animes.
Don't put futuristic tech on the IEM. Just a single-DD with a decent shell design and they'll be earning huge bucks. Otakus, and K-Pop fans as well (those that I know, at least) are big spenders on official merchandise. Now, getting that "official collaboration" status would be the hardest obstacle.