In authoritarian regimes, the truth is often written in sand and not stone. Count Diablo has reappeared, insisted the he was never dead and thus never reanimated either.
I am certain at least that Marcus had a plan to automate the bloodwyne fermentation process, which was thwarted by Koen.
Who is telling the truth? Perhaps Marcus is succumbing to the family madness faster than I expected.
In light of the newest family troubles, we may be even more vulnerable.