It should be a very basic map, so that people don't have to undo anything to customise it. People should be able to build on it as it is, so I think a small number of provinces is best. Maybe 3 factions (not many mods will want only 1).

The ideal would be to have the text for having more than three faction commented out. That way to have an extra faction would take a minimum amount of work. But thats probably to complicated, best to keep it simple.

If your doing this DJ, thats great news. :)