I asked Stern last night about production of all the current models and if any current production will incl the new SPIKE system.
The response was that ONLY WWE Wrestling will be getting SPIKE and any future titles.
The Walking Dead, Star Trek, Mustang, Metallica and Iron Man will continue on being made using the pre SPIKE boards, wiring and parts.
I was wondering if future TWDead would get the new system given it should stay in production for some time to come but it was a definate NO to it having the SPIKE system.

I can see that it's probably safe to stay doing it this way because if they changed to the new system now, people who have recently bought all the various titles would go bananas and want to swap for the newer system.