Yes - that would make sense. Running a kingdom, go on quests in a map like BG1 - maybe a much fancier version of Birthright: Gorgon's Alliance but more focus on main char development, and not the Crusader Kingdoms level of ... wait a second... that could be something.
Either way, You choose a class - you pick from a list of classes a la Morrowind or create your own class. You go around and solve problems and get rewards, and raise an army. Once you level up enough, you attack a weak castle. You have your typical M&B 200 v 200 or whatever battle. Once you have a base of operations, you
- Healers - go around healing and buffing the team, and fights with a war mace - depending on your character focus. Maybe raise the dead as undead to fight during battle.
- Fighters - go toe to toe, or ride around in mounted combat but actually use the +2 Greatsword plus feats
- Mages - use crossbow, spells (entangle, fireball, whatever) - eh, M&B with fireballs (on both sides) would be pretty awesome. Maybe with real world Myth: Soulblighter level destruction and teraforming when blasting the castle (which you'll have to pay to fix later on, if you take over the building)
- Rogues - do idiotic flips and stabs in combat for the Assassins Creed crowd ... sigh. An unstoppable, unrealistic, killing maching. Doesn't raise an army, takes on 200 mounted knights while standing there like an idiot - picture Legolas or whatever
- Bards - play music during combat, then get captured and suck off the enemy to escape
