The DemonApocalypse is the event that will occur after the Zombie Apocalypse. In case you were wondering, the Zombie Apocalypse in a nutshell is when zombies will take over. The Demon Apocalypse is when all Hell will break through into our world (literally). What humans are left alive will have to go through this.
Here is a time line... 2012: The beginning of the end of the world. 2013: Zombie Apocalypse. 2016: Demon Apocalypse.
I'm not sure how I will survive during the Demon Apocalypse! How do you kill a demon??