Games are tricky in that you never know what will happen during the pre-release stage, so it can take years more than you think it will to finish it. So I feel like the devs have stopped giving us a release date, just in case they have to push it back again.
I'd guess that if everything goes at a normal pace, it'll probably release mid-to-late 2020? I wouldn't be surprised if it got released around 2022 either, though.