Think about Venom, from Spiderman. Now think about an infection that can take over a person turning them into a zombie. Combine these together and you have the basic idea. A virus spreads through people that can manipulate blood and its spread through biting/saliva

Think About the time of Vikings (or maybe even the look of the new Beowolf movie) where Norse mythology was huge. A time when people believed dieing in battles was the only way to live.

Bring these Norse Gods to life at the time of Ragnorak (their Armageddon) Where everyones death, Even the Gods, is already written in stone. Now Bring in the unforseen Zombies and Create an unforseen Hero.

The Hero, A zombie, but in control of his body. With the ability to change the fate of the Gods and the world.

Will he help the gods assassinate eachother? Will he fight for choas or order?