It looks like Dead Island 2 is releasing a first expansion called Haus. It will take you to new locations while dealing with a mysterious cult and surviving the zombie apocalypse.
Techno-death cults are the focus of this new storyline, which is led by a crazed leader named Konstantin, who considers such battles to be the “paragon of the future.” It takes place in a Malibu villa, described as a “deranged labyrinth of biomes that subvert rational architecture with narrative spaces that expand.”