Nearly as soon as I get into
VC, they will probably release a new army book WOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO!!!!!!!!
Although I expect there will be significant changes everywhere, as at the moment, the
TK army book and rules are spookily similar to the rules for vampire counts, so hopefully we will get masses of new stuff, and we won't lose the focus of using magic for resurrecting stuff like the Tomb Kings have(which is why
TK skellies are so cheap now, especially compared to
VC skellies)
And on the subject of lores(plural!!!!

), I think this sounds quite likely. After all, we have had a half-hearted multiple lore thing with necromancy spells. I think the lores will go up in stages, so necromancers get to use the Lore of Necromancy, which is the fairly typical low-level spells like Invocation and Raise Dead, which are designed just to keep the army going. Then vampires will get access to the Lore of Vampires, which will include a wide variety of spells, with a nice lore attribute about raising models(for each spell cast, the vampire's unit regains D3 wounds or something like that)
And then Vampire Lords might get a lore of their own; The Master Lore of Vampires. This will be wrath-of-god type stuff, and will probably all be really difficult to cast. So there'll be mostly raising models ON A MASSIVE SCALE

and blowing up the enemy using magic vortexes.
Phew. Hmmmm.....I think I might have started thinking about this too much. I think I might need a lie down........