Confirmed that it's supposed to be in the game. If you're sitting on any stockpiles of greater cosmic essence or infinite dust now's a good time to sell it. :P
A new enchanting recipe was recently hotfixed to become available. This recipe is available through enchanting trainers. The reason why you may not currently be seeing this recipe is that it requires the server to be restarted to become active. We expect this to be live on all US realms no later than next Tuesday, October 6, as that is when the next scheduled maintenance is set to occur.