I should note that half the screenshots are ours and the other half are Shrapnel's. I'll probably replace them all with our own shots later tonight to avoid any confusion. The Shinuyama screen (Japanese one) isn't ours so I can't really comment on that one.
I didn't write the preview, but I did take the screenshots. It's worth mentioning that when I took the shots I was playing on a small map (you can choose much larger ones). Here's a shot of the
full map. My supply usage was so small because I only had a small number of units in that province. Here's my
Nation Overview so you can see how many units I had at the time (or a turn or 2 after that). It costs about 1 supply unit for every 1 human-sized unit.
As far as the fortress, you don't select which one you want during the pretender god creation like you did in Dom2, but you can construct buildings later.