I'll Go into more detail as time allows, but suffice to say that the release of TES:5 ("Skyrim" - Which I *do* have), brings up many questions/concerns that may (or may not) impact on the on-going design process of Hammerfell.
One obvious factor (not going into detail to avoid spoilers) is the Inclusion of (uniquely styled) Dwemer ruins in Skyrim. Ruins that appear across the province, right up to its border with (north-eastern) Hemmerfell. How will these 'mid-way' dwemer impact of Hammerfell's Rourken 'exiles'? Can we 'borrow' anything from the architectural style of the Skyrim Dwemer? What about cultural implications (as it is now apparent that there isn't the massive geographical gap previously suggested - and thus the idea that the two 'branches' of the Dwemer race have NO communication with each other at all)?
There is a LOT to consider just on the subject of Dwemer alone, and there are other things besides that will need to be considered too...