I think we may be overdue for Italy(and perhaps Thailand). Here is my reasoning:
There are 13 countries(Argentina, Brazil, Russia, Germany, France, Italy, Austria, China, India, Japan, Malaysia, Thailand and Australia) which have been visited on at least 4 different seasons. All of them have been featured recently(meaning TAR16-TAR18) except for Italy(TAR12) and Thailand(TAR14). Good chance they go there sometime soon according to this very unscientific conclusion.