It was successful enough to warrant another effort, but despite a bunch of hints and rumors, it isn't official.
However, an announcement may be nigh. As spotted by Siliconera , Techland has filed a trademark for "Dead Stop," which may be coming to both consoles and mobile devices.
The patent was filed specifically for "entertainment services and providing an online game via an application for mobile phones and other electronic apparatus," so maybe it'll only be for mobile devices. If that's true, maybe the rumored "Dead World" will be the console sequel all the zombie-slaying' fans are waiting for… "Dead Stop" is a strange name (although we get the pun, of course) and we really haven't seen anything for "Dead Island 2." But hey, "Dead World" isn't bad. Does that imply a bigger environment, or what?
Anyway, for an open-world survival game blended with bloody action, Dead Island was pretty damn fun. You might want to check it out during the slow summer months.