Yeah. The only unique theme missing is a Arabic/Middle Eastern faction.
However, they'll play like a mix of the other factions. Infantry more solid than the WuXia, but not as heavy-hitting or armored as the Deltorian/Menevero. Archers will use composite bows at best, but they will have leather armor at most. They will be given cool shamshirs or other curved oriental swords instead of the axes and straight-blades that Deltorian longbowmen use. Hmm...I guess they can also have gunpowder units.
Anyways, I think I'll just redo the whole map if the map editor works with Warband.
When I learn how to port I'll just use Warband's map for the time being.