I think we'll see minor evolutions, but nothing big. It seems to me the board will want to start recouping R&D money. I don't see the charging options changing. Although, a 3kW charger and J1772 socket standard would be a nice and give it an advantage if competing with the Empulse. I definitely don't see the motor changing, it's pretty badass. The battery pack might grow a bit bigger though. Not a lot, just a bit. I definitely see a size 6 controller coming stock if Hollywood Electrics starts selling their upgrade kit in decent numbers.
As far wants, the S has got to start coming with real wheels and tires. I know the bias ply tires on the bike are really good, and you can spoon on a 140 radial on the back, but you are still pinching tires, and bias-ply tires are not radials not matter how you slice it. A 120/160 tire combo for the S (which would mean a frame and swingarm revision) with an upgraded controller and some custom suspension sounds like an actual Empulse killer. With a Size 6-controller I'd like to see Zero take a real shot at making the DS knock the NC-700 and all those other middle weight adventure bikes to the floor. Ultimately I'd love to see Zero taking BMW head on in the adventure bike segment. Maybe not in range, but just in out right performance. With the addition of their newest board member, I think they now have all the know-how to do just that.