There are two LLs I'd like most for Norsca with a LP most likely during or after game threes release. One off which is aligned to a certain God, which I know goes against their campaign right now but for game three I'm sure they will have a new end game.
Having one new Lord who stands apart as a Norsca/DoC hybrid could add something a little different.
The two I most want to see you probably can guess are Tamurkhan and Sayl the Faithless
Tamurkhan would be the main adversary for a LP bringing a new creature in the form off Bubebolos his Toad Dragon with possable ranged attacks as a fairly swift heavy hitter
Sayl the Faithless as the Flc with his unique Spawn Nightmaw and the First Spellcaster LL for them
Units I'd quite like
A Shaman-Sorcerer Lord choice with range off magic
Possable hero choices Rotbringer/Nurgle sorcerer
Savage Dolgans, maybe using the frame/animation off the new female wardancers
curs'd ettin, Rune-Callers version with spells from Shadow, Death
Kayzks Rot knights as a armoured cavalry choice
Plague Ogres, maybe having some mutation inhancment for armour sundering or a ranged type attack
Perhaps Deamon units just available for Tamurkhan, maybe as summons
Possable Nurgle RoR versions off the following units for Tamurkhan
I know Norsca are in a good place army wise but having some Spellcasters and Nurgle varients could be alot of fun