Are their any details on the next gen IP? I would think it would have to be 16nm or 14nm and be in the sub 0.10 J/GH to stay competitive. The real question is how much additional work/money is needed to make this a working chip.
You can contact the Hashfast CRO if you are interested, they would have the details you are looking for. There are supposedly 3 generations of IP, 1, 1.5, and 2.