It is likely that this area is a placeholder, maybe not revealed at all at release, but if they make cross game DLC with LL for game 1/2 race, they need to put them somewhere. And add regions in this area. The good news is even if we don't have full new races there, it becomes open ground for modders.
The list of regions is in the game table. I don't think CA would take time to make it all and scrap it later. It's however likely to be adjusted a bit. So I guestimate it to be may 90% accurate.