What I would like to do is internally balance them against their typical opponents, so Dwarves vs. Gundabad or Misty Mountain Orcs or Gondor vs. Mordor. That way, I could push out campaign supplements in a logical manner, since they'll take a while to write up. Based on how long it took me to write up my Domain of Soissons conversion for Dux Brit last year, I'd estimate that I could do 1 campaign every week or so. I'll be starting tomorrow and should hopefully have something to show for it come Monday or Tuesday.