It is still very early in development. It might change. (earlier or later).
This is the only official info on the release date that has been announced so far:The devs have mentioned recently that the project is "slightly ahead or in a better position than anticipated at this point".
I'd say 2019 just before xmas, as xmas gift.
Today is one of those days when I thought to myself, I'd really like to be playing Ashes right now 21 months seems like a lifetime.