Hmm, digging into the world of 'Homunculus' always feels like peeling back layers of a psychological onion. While there's no official announcement from the mangaka or publishers about a sequel or spin-off, the open-ended nature of the original leaves so much room for exploration. The way Nakoshi's reality blurred with his perceptions could spawn a dozen side stories alone.
That said, the manga's cult following keeps hope alive. Remember how 'Parasyte' got a surprise revival decades later? Sometimes creators revisit their works when the timing feels right. I'd love to see a spin-off focusing on the other test subjects - their backstories could be just as mind-bending as the main narrative.