If you're looking for an interesting campaign to take for a spin while you wait for the update to Bretonnia or the Lizardman/Skaven LP, I suggest using Crynsos' Faction Unlocker and playing his Bregonne faction that he created and put in Lustria.
No LL, starting with a minor settlement in unpleasant territory, and needing to wait several turns to be able to recruit units of any value, this campaign has proven to be quite challenging. It's proven to be a nice distraction from the main campaigns while allowing me to play a faction I really enjoy in a part of the map that I never get too.
He also has Clan Volkn as playable, another one he added to the game which is fun diversion for Skaven players and Konquata in Albion! All three are quite interesting and allow for fairly new takes on the currently available races.