After all of this time, I'm not sure if Iron will be finishing these. I don't have much information about what he's currently doing, so, he either: decided not to finish this and move on to other important work, or, is just very busy in general.
Sorry if this wasn't much help, I'm just saying what I *think* is going on.
Edit: Also, rushing doesn't help, so stop leaving all of these posts about him needing to hurry up. If you aren't happy with what's there now, then make it yourself.
Since there has been silence here for a long period of time, Id like to say that I doubt that he's going to continue this, or finish it at least. Last I checked, iron is working with Antvenom and Caveman Films on their Mine Nights series. That being said, he's put his focus into that rather than the maps. I hope you all are okay with this and enjoy the series that they make with their talent.