Chris8, to the best of my knowledge there are S30V Delicas, and some Super Gold Delicas or Enduras coming up ( same steel as R2) Those will be available only through one source and are likely already pre ordered and will only be available to those of us that didn't get in on the pre pay when individuals flip theirs on the secondary market.
My best guess is there will be others in the future though nothing is set in stone. The ZDP 189 versions are worth trying if you haven't already. Those have the advantage of having been in production for years. When those hit the market they were the hottest ticket around and the first factory folder running at rc 65 or above. They are almost forgotten now but remain great performers.
Joe