Maybe Honda should follow Ferrari's foot steps and give people who already own one first dibs. No discount, but if a current NSX owner wants the new one, he will be put on front of the GT-R owner who just wants the next big thing.
There is no waiting list, but just a priority list, like waiting for a first class upgrade. You don't know exactly how the system works, but once your number is pulled, you get one.
This is a possiblility but Ferrari only does this with original owners of their cars, and usually you need to have bought 5 or 6 before you qualify.
Discount? Pipe dream. Just negotiate with your dealer the second year they are out.