Fan sequels have come up a few times. That's complicated, but here goes.
At this time, I intend to make use of the sequel hooks we planted here in further things set in this universe. I'm not sure how we would want to handle possible fan sequels. I do want to make sure you guys can keep playing in the sandbox if it turns out that we're not going to build any more castles.
Maybe the best way to do a fan sequel would be in such a way that it couldn't possibly contradict a canon storyline. There's room in the Metaverse for a lot of different stuff to happen. As long as whatever you do doesn't involve any canon we control directly, like Mr. A or the rebels or the Cabal's bodies, etc, then I guess you can do whatever you want.
It's also possible that your fics would happen to a reflection of the ARG a level deeper or something. That gets super confusing but hey, maybe.
Another option would be, if you guys need to play with Canon stuff to make your stories work, just talk it over with us before you do it, so we can help you build something that works with what our plans are.
I'm open to discussion about canon, basically. But not right away. I need some time off.
Also, we accept spec submissions to Echo Chamber and if there's another ARG, there will probably be open applications to write for it.
These are my personal feelings and don't represent a consensus on our side of the table. It's an ongoing discussion.