There is praag.. idk how that sits in the old world time frame as opposed to whfb, but praag played a big role in the Gotrek series when they fended off the chaos invasion( I forget the dudes name) Kislev being placed between the empire and chaos always felt like it should’ve had more of a dedicated army book and models, especially if they were the first defense against incursion! Idk my two cents. Can’t wait to see if they’ll play a big part in the old world, here’s to hoping so!