Dead Island 2's had quite the journey already through development, and it's still not even close to release. Originally announced a few years ago, it was in the hands of Yager Development for a while. That was until publishers of the game Deep Silver announced that there'd been a split between the two companies citing that "respective visions of the project fell out of alignment". Earlier this year we were told that Sumo Digital were now looking after the game, but with its history you can see why yesterday's disappearance of the game's Steam Listing caused more than a few people to question if the game was still in development.
No worries though, Deep Silver has assured fans that this does not mean a game cancellation. When asked about the disappearance Deep Silver said "Dead Island 2 is in development with Sumo Digital. Once we have new details to share, we will do so." It doesn't tell us a lot, but it does seem that the game is not dead.
The vanishing Steam listing was first noticed by NeoGAF yesterday and alongside the speculation of cancellation some people theorised that the listing was only down while Deep Silver and Sumo revised it to reflect the new direction Sumo Digital will be taking the game. Not that we know much about that new direction yet.
With E3 coming up, maybe we'll see the new details of the game there.