je les ai contacté et ils m'ont répondu :
Thank you for getting in touch to find out more about Dead Island 2. The team here at Sumo are hard at work creating a game we hope will excite and delight fans of Dead Island! Unfortunately, we're not quite ready to reveal any details about the game just now, but you can be sure that information will be released as soon as we are at a point that we can share more.