I've just finished playing from start to finish (i only stopped to sleep) this VN and it was easily the best written, immersive and deep VN i've ever had the pleasure of interracting with.
That being said, the lil epilogue did catch me off guard. Apart from wondering why VNs always break the MC and love interest up (albeit temporarily), I had some thoughts about Alex returning to Soulcreek and unlocking that power. These are my theories for the next game, Voidsinger, in order of what I consider most likely.
1. Mylo
Soulcreek was a supervillain origin story. There seems to have been an assumption that Alex is the villain, but with the note we are left on before the epilogue, I can see no path to him becoming a villain from this. He was content. He had purpose. He was loved. He had a mission (help byte). Supervillain origin stories tend to end on a tragic note, and this was not tragic. I posit that this origin story was actually Mylo. He is the only other real "Origin" in the VN other than Alex and Byte. Byte is in no position to become a supervillain. Mylo saw things that changed him in the attack on the tribe. We have seen his incredible "Craft" power. We know voidsinger will be told from a dual perspective of Alex and Mylo. I think Alex taken on the power not because he is a villain, but to save Mylo from doing something bad. We know of Mylos intense trauma, he has potential to turn "evil".
2. Return of Humanity
It could be entirely possible for humanity to return. This seems like a totally off the wall suggestion given their 1000 year extinction. But why else would Alex keep mentioning it? It gets mentioned more than a few times even though seemingly impossible. It could well be that somehow, out in that big world, there is a way to bring them back (hibernation pods?). In doing so, it is possible that they will yet again be attacked, maybe by Mylo as a tie in with the first theory. Maybe by the clans. I theorise Alex would take the power to defend them, with Loken by his side. If Loken had abandoned Alex, he would be devastated, yet he seemed logical in the epilogue. I believe Loken would stand with Alex to defend humanity even from the clans, but was only not present due to the noxious gasses in Soulcreek.
3. The Automonks & Gaia
The Automonks could be the big bad. They are supremely powerful and definitely have ties to the cascade, the algorythm, and therefore ExoTech. They definitely give Vault-tec vibes, and their story is given no advancement once we know they keep maintaining ExoTech facilities. We also know that Gaia inhabits the lake which powers the dam. Being so close to a blackzone has a negative mental effect on people, and it could well be that the Automonks become known as titular "Voidsingers", communing with Gaia in the Lake. I believe they were initially ExoTech remnants entasked with keeping project Icarus alive in whatever way they could manage (Keeping facilites with the algorythm powered) but get corrupted by Gaia, making themselves the antagonists of Voidsingers. Even if off, their stories, and Gaia are not done with I believe.
4. Lokens Death
Don't panic! I don't think our good hound is dead. But all we know is that Voidsinger is 15 years in the future, and that Loken is "In" Voidsingers. It could be flashback scenes until we know more. Loken was Alex's biggest attachment to this world. If Mylo has moved onto his own life, and Loken was killed (maybe by a demon) then that could push Alex to unlock the power, most likely with the intention of destroying blackzones forever. However, I think this is less likely due to Alexs compusure in the epilogue, and I doubt Lokens inclusion in mentions of Voidsinger would be included if it were flashbacks.
5. Alex Snapping
I believe this to be the least likely scenario. Alex is grounded in Loken. With Mylo. He has family and a clan if he still wants it. He has dealt with his enemies and overcome his rage. I don't really see any scenario without something above happening, that would result in him just deciding to become a villain. Not that opening the power of Soulcreek *means* he would become a villain. You get my point.
6. Drevonia
Drevonia could certainly become a villain. She'd done some bad stuff! That's not a far fetched idea. I can consider this an opion but by far the least likely because it was a "Super" villain origin story. She doesn't seem to have any abnormal powers or abilities. I'd be surprised if Ryuo went down this route.
ANYWAYS!
Thanks for listening to my ideas. Ryuo, from a fellow author, you have created something amazing here. I can't wait for Voidsingers. It will hopefully be out just after my birthday! If you want to message me and tell me if I got ANYTHING right, then feel free to message me on TG at @Itsturo. Or if anyone wants to chat about my theories, hit me up!