Modders could do this even without Taleworlds doing it, though it's easier to start with a working system of regions and dynamic spawn points and mod it.
The main problem here is that there are bazillion maps that need to be made and it's questionable when if ever TW can accomplish this. The same applies for modders using similar region granularity. There are just too many damn regions.
When Taleworlds starts delivering and we can gauge their map-making rate, then we'll know whether this feature is feasible at all.
It's possible that this whole idea came about just because the TW sceners ran out of work long before the tentative release date, so they think they have time for huge projects like this.