I know this is a little early but i thought of something u could do after virtual villagers. Well you are calling the different Virtual Villagers "Chapters" so why not have a sequel where after they are through with the island sumthing happens where some people fall into this magical river and it washes them into the ocean. When they surface the island is out of site and then one of them discovers he can breathe for a long time underwater so they all try it and they can all do it so they go under water and swim a long time and then they discover some ruins from some kind of civilization underwater. From there u could start a whole nother Sequel of an Atlantis civilization. Any other suggestions?

And u don't have to call it "Virtual something". Virtual Atlantians does have a little bit more of a ring than Virtual Citizens though.