The event, titled "Outbreak," will arrive with the first season of content (titled "Operation Chimera") when it drops sometime early next year. The event will be free-to-play during a four week period, which seems to imply that you won't need to acquire the Operation Chimera content in order to play. In the new event, players will take on zombies, who are the ever-present threat in video games. Additionally, during that four week period players will be able to earn unique cosmetic rewards tied to the event.