Zombies v. Ninjas: Exodus

The ninjas have escaped from the undead army, but at a heavy cost.
Mount Leinster has become a killing ground; thousands lie shattered in the foothills.
John Baptist and de Nazarene will march again to eradicate the humans.
It is time to leave. All that the ninjas knew and loved is destroyed.
Is there a safe haven on this Earth?
Is this the end for the human race?