I like the designs, which of course are too detailed to have made the cut when costing out the molds.
However I really do like the mini/personal Cobra VTOL design. I really think it would have been a good choice for a small vehicle (with some modifications). I also see a lot of Halo/Aliens/Anime in the designs, but so what? This is slightly futuristic as Joe should be, not crazy out there designs. Honestly I love the APC from Aliens and any "homage" based on those drawings would be an easy buy.
The large tank would be a never made item so I will enjoy but know that a vehicle large enough to hold 6 figures in that configuration just isn't likely anymore.
Overall we can see that quite a few of these designs made it to shelves in fairly true to the design forms. The Ghost Hawk II and Black Dragon are easy to see there, and most of those figures came out with the exception of Baroness and the Polar Ripcord who looks like he was used to make either ROC Arctic Duke that never got released or POC Alpine w/Mech that also never got released.
I would love to see a Cobra Trooper of some kind based off the design that eventually became the POC Iron Grenedier.