Originally posted by SpeedFreak3:

I think it will be the latter one.
With the Hearth anmd Home update, the devs added tar pits to the plains and these only generated at places that were unexplored.

Would be great if the already explored mistlands would be filled once the update gets released but i'm counting on them staying empty.

So where as I just explored an island that was 75% mistlands when the new update comes out itll likely all stay empty and only mistlands I have not discovered will actually spawn anything new?