Here is some summary information from the "New Projects" thread (some of it modified as needed):
The map will include most of Europe and North Africa, as well as part of the Middle East.
Still looking for a good map.
Units will be done similar to the way I did them for the American Civil War scenario, with each country having several unique units.
Cities will be historical to fit with the time period, using their actual names of said time period, and placed as accurately as possible.
There will be a variety of units, to add more realism to the time period and to the scenario.
Techs will be more diverse than in the ACW and WWI scenarios, providing for more than one path to victory or dominance.
The map used will be adjusted if I find a map of the time period, using the coastlines of that time period rather than the present-day one.