Examples include the southern-most map, Cordon - the rookie village could inspire a village with a rather shady trader, with a bandit-controlled fort nearby, and you might find very large marshes to the west. The Dark Valley could inspire an actual valley, along with a city where the region's Thieves Guild and Dark Brotherhood equivalents operate from. The Bar could inspire a capital city complete with an arena.
It wouldn't be Tamriel, there'd be a new story, and the standard player races would need to be looked at as to which would be suitable. I understand modding is a lot of work, and that one can't rely on others assisting them. I will be looking into the Creation Kit and mapping, and hope that at some point there will be people interested in joining in this venture (if it gets anywhere on my part).