On the official Need for Speed's forums the map of the entire game's world has been posted and it definately gives a hint to what to expect from inevitably coming DLC.
We have taken a closer look at the map and dicovered that some of the road's numbers are "missing". Every single one has a number assigned to it - but we haven't found 4,14,20,21,24,27,28 and 32. Is Criterion going to add these in DLCs?
Furthermore, you can absolutely agree some of the areas are way to empty, aren't they? We can assume that it'll all go similar to the Burnout Paradise's way - like adding the Big Surf Island for example.