I posted this idea over at the Taleworlds forum. Thought I would also post it here.

Some kind of mod involving undead/zombies- the main featuring being:

Somewhere on the map is a necromancers den.
If you bring him certain items (like weapon crafting in the paleolithic mod) he can "make" your recruits.
What would be needed are new items for body parts (a little disturbing yes.. but hey this is a necromancer) which could be taken from the dead in battles.
Some units would only need very basic requirements- like only body parts and what ever money is used- while others would need various combinations of weapons/armor/money
zombie units would have some disadvantages, like lower hp's and be slow etc
Once one of these units is "killed" it remains in your party but "unconscious", until you return to the necromancer to have it revived (for a fee).
These units do not require food

Not sure who would be the "anti"-undead factions or how they would operate. Perhaps have an all 'evil" factions mod. Necromancers would be the human faction while have your standard orc/goblins as the other faction.