https://www.pcgamer.com/dead-island-2-is-still-coming-says-official-twitter-account/

When Dead Island 2 was first announced in 2014, Spec Ops: The Line studio Yager was at the helm. Then, in 2015, publisher Deep Silver confirmed that it had dropped Yager as developer, before announcing in 2016 that Sumo Digital would take development reins.

But news of the sequel has been scant ever since. The original Dead Island creators, Techland, went on to release a superior open world zombie adventure in Dying Light. Deep Silver did confirm that Dead Island 2 was still in development in May last year, but whether it would resemble the Los Angeles-themed game originally envisioned by Yager, or something else entirely, was anyone's guess.