The Black Masses
This game doesn't look too good, but I'm hoping it turns out to be, this is a very good and innovative idea to an almost stale genre.
"The Black Masses is an open world first-person fantasy co-op RPG. The Black Masses features our next generation of crowd rendering technology rebuilt from Ultimate Epic Battle Simulator. Explore a 16 square kilometer island populated by hundreds of thousands of possessed inhabitants. Escape the hordes by traversing buildings and obstacles with our parkour system, or face them head on with powerful abilities and immersive first person combat."
Coming Spring 2019.