It will probably be 2-3 more years. They will try to revive it, if revival fails again, they will just discard it and probably shut down development completely… after which they will shut down servers.
Only thing which can save it is community, but I’m fearing community has already given up.
Like community saved SC2, but then again, SC2 has strong roots in Korea, which kept the whole project going. It was so close to being completely discarded when pro players stopped playing and moved to more lucrative games few years back.
Sadly I’m not seeing that happening with HotS.
Warcraft Reforged will be massive though.