Fwiw: colonies will also remain. It is a special purpose, one turn a day island. People play there for the slow turn rate. Because it is low population, nothing we do to it, leaving it or closing it, will really have any effect.
So, if I'm understanding everything correctly, we are looking at two possible cases.
1. Atamara, Far East Island, and Beluaterra are closing.
Or
2. Atamara, Far East Island, Beluaterra, and Dwilight are closing.
Case #1 seems more likely with the need to keep a testing island.
Please note, I'm not a dev so this is only guesswork on my part.
It seems that