Currently we have cards from the following armies:
Empire, High Elf, Dwarves, Kislev (Gustaf the Bear)
Beast of Chaos, Demons of Chaos, Warrior of Chaos, Dark Elves, Orcs, Skaven
I hope at least for a well-developed undead army (Khemri/Vampires) for Destruction and one Lizard Man army for Order (Imo the Lizuard Men are the one which is most different from the other races). And one Skaven like themed order force, Imo Brettonia or Asrai (Wood Elves) would fit (or more Kislev card since they are basicly fighting with everyone who is fighting against Desctruction forces).
And I hope for the other races that they appear as neutrals at least Ogre Kingdoms and Tilea make sense since most of this units are Dogs of War.