An interview with Rick Remender has surfaced on CBR talking about his plans for the All-New Captain America and an All-New Hydra containing none other than a newley resurrected Baron Blood.
CBR - 'Another member in Zemo's sect with Nazi connections is Baron Blood. Is this a new incarnation of the vampiric villain? Or has the original Nazi vampire been resurrected?'
RR - 'He's not new. He's a vampire, so we can resurrect him, right? I wanted Baron Blood back. We'll have a little bit of dialogue explaining it. With a vampire, I think I can get away with it. If it was anybody else, I think I'd have to spend an issue explaining the resurrection.'
'Baron Blood is not just there for window dressing. For the plot that Hydra is up to, they needed Baron Blood. So they've gone to great lengths to resurrect him and ensure that he's on board with their plot, and he is.'
For the full interview... http://www.comicbookresources.com/?page=article&id=57500