Luckily Deep Silver has already commented on it:
"Dead Island 2 is in development with Sumo Digital. Once we have new details to share, we will do so."It's been a couple years since it was first announced and then there's been turbulent times throughout production- leading to Yager Development's departure and Sumo Digital taking over. Considering E3 2016 is only a few weeks away, this isn't the best news to be hearing.
It seems all right that Deep Silver has commented that the game is still on the way, but it does give us pause with a long history of problems. Even original Dead Island developer Techland had offered their services and to take over, but alas, Deep Silver went with Sumo Digital anyway. Think of what Techland could be doing after their unbelievable Dying Light. Well, we'll just have to wait and see what comes of our favorite zombie infested tropical paradise.
Sources [ NeoGAF ] & [ Steam ] via [ Gamerant ]