I'd prefer an HSS with PRS Pattern Regular maple neck, just like my NF3. That would be my PERFECT HSS guitar. But, I don't think it's going to happen. PRS has tried similar things in the past without a lot of market success, so what is much more likely is a Silver Sky HSS model with all the JM specks except one humbucker. I think they almost have too try to capitalize on the crazy success of the SS. Once they can catch up some, that is. They'll probably wait until sales are no longer backordered, then come out with another slight variation.
I don't see the neck changing though, or as said, it's no longer a JM spec guitar and that is what's selling. So for now, either drop a JB or Little 59 in the bridge, or open it up for a real one... or find another NF3 and drop some great SC's and a new pick guard. THAT would be my ultimate SSS guitar.