Adding a couple themes to the "future possible themes" list. I took the liberty to write actual descriptions that are relatively short summaries. Better to save long lists of possible content and links to inspirational images/pages for when a theme actually starts.
Also, since the challenge has pretty much always been about creating new content, I would lean very far away from just importing existing models from free download sites or those pulled from other games (even if tons of work is put in to correctly animate them for NWN). I'm not talking legality issues, it's more about the spirit of the CCC...make new stuff, not simply add stuff others have made to NWN. I think content from existing sources (or even, "let's all collect anything out there that fits this month's theme") just doesn't fit the CCC.
A Farmer's Life: A farmer theme... More realistic farm animals, ground-based crops (tomato, strawberry, water melon, potato, cabbage, etc.), farmer's clothing (hats, work gloves, outfits), more farm tools, placeables (sheds, tools, outhouses, barns), crop growing/harvesting scripts, new farm sounds, or even prefab objects (to help builders quickly flesh out NWN farms). Give those thousands of farming commoners more to work with!
{ Suggested by: Anamorphose }
Historically Inspired Arms & Armors: Armor and weapons inspired by (and looking more like) actual medieval war equipment. More accurate looking armor and weapon models, prefabbed items with accurate descriptions and possibly adjusted stats, whatever. Basically stuff that will provide a fighter/paladin/whoever with gear that is more realistic medieval-themed than fantasy medieval-themed.
{ Suggested by: Wallack & MannyJabrielle }