I agree. There are several old favorites that would be cool, but the wording is that it's a Von carlstein, so no to many of those. Leaves us with vlad, manfred and Konrad. I'm skipping the likes of Jerek and such. Konrads just not that big of a charactor and so that leaves us vlad and manfred. Not knowing really any of vlad said background before he shows up at drakenholf lends to him having a repertory with nagash, while manfred is out to wrest power from him instead.
Kinda hoping its vlad just for the reasons that it was him who drew me to the VC when the codex changed. While having that whole " let's raise a army and take over the neighbors" problem, he really tried to work with the living.