Wrote this on another thread, but I hope they would lean on the cults and have a "Cult Crusader" list so you can do Crusaders of X; I think given the factions they set up in the rulebook, it'd be Sigmar, Ulric, and Taal, and one side can take units from the other side and give them new rules and prayers for each army. It's basically the old Middenheim/Ulric list expanded combined with the Crusading Knights & Knightly Orders from Citadel Journal & WD. Ulrican core can give their state troops +1 WS, stubborn, and the ability to accept challenge as rank-and-files as upgrade as a stand in for Warriors of Ulric and Wolf-Kins, for example. And like the Knightly Orders from WD#310, give us the option to choose from a handful of more special rules for Empire Knights & IC. Also given the lore description in TOW, they will probably just give a wizard with elementalism an upgrade to represent Taal, if they do this.
Going by the current format of the arcane journals, I think we will only have two army lists. By combining cults and knightly order, I hope we can have another list that focuses on rebels or self-proclaimed kings at the like -- such as Sudenland, which is shown on the map of the Old World but is not included in any of the four claimaints' territories. So hopefully we can see mercenaries for this second list, like the "Bretonnian Exiles", where they can add stuffs like Ogres and Halflings.