GSC Game World, the recently closed-then-reformed Ukrainian development team behind the first-class Stalker series, has announced that they won't be continuing development on Stalker 2.
https://twitter.com/gscstalker/status/195186120387080193Instead they have announced the spiritual continuation of the series in an upcoming title Survarium.
https://twitter.com/gscstalker/status/195182555899756544