Great producer

, great respect for the man after hearing! Loved the interview, it is rare to hear exactly what i'd say myslef almost. If 1 or 10 buy it we'll produce it bodes well for many possible DLC's, and much of my money going to this company. My ideas again, it'd surprise me if it wasn't 1, 3 or 5
1, More events and such like for western Europe! Can always develop a great thing more

. Support for heresies, more plot types, more intrigue etc.
2, Expanding East a little bit to follow Alexanders conquest line a bit more! Elephant troops!
3, Pagans yes, Norse mod is always fun, if you can do something of this caliber or higher I would purchase it.
4, Fantasy - DLC Vampires, undead etc sounds like fun. A faction within the game that doesn't directly control land at first, they can gain land however if they get powerful. Vampire trait that can spread on courtiers, possibly hidden?, vampire council somewhere in the game that the church are hunting down etc, the possibilites are quite fun. Do you ally with them, accept them, or try to wipe them out (or become one)?
5, Trading Republics Venice, Venice, Venice!

6, Unlanded factions could be struggling within larger empires, and you can support them helping them come to power, this is more for 5 and 4 above but it has potential to fit any design.
7, Starting as a Baron I read here, its an idea I've had once but its more of a minor thing really, nice as a novelty value. It'd put you possibly 4 tiers deep at game start which would be an interesting play through.