Techland had a great deal of success with Dying Light a few years ago. The game is still played a lot today and gets an update now and then. Yet a sequel would not be out of place and perhaps it will be announced during the E3 .
According to the Polish website Graczpospolita the developer is working on Dying Light 2. The website writes this on the basis of several independent sources, which both work at the developer and have been working.
At the moment the developer is busy preparing an E3 trailer, so if this news is correct, we’ll hear more in a few weeks. Still take it for a while with a grain of salt.