Quoted from KozMckPinball:
My opinion is that PP/CGC will take a look at how the remakes are selling, how many, and project the acceptable volume to remakes that can make those numbers. I think they've already been doing that, but if they can make say 1000 or 1500 machines be profitable, then they could take a look at some pins that they may have overlooked. I think if 1000-1500 is the sweet spot, TAF and IJ are possible remakes. They were probably overlooked in he past because of big original run number of machines made.