It's not coming.
The lofts are too strong on the Forged and Hot Metal to consider it. You'd essentially end up with a 2 iron. On tour you might find that its a similar loft to the original JPX919 Forged 4 iron, but that they've taken the number off as the player doesn't want to have a pair of 4 irons.
Not always what it looks like with the tour.