Quoted from Concretehardt:But who will code it?
If the next game really is Keith Elwin’s, he will supposedly be creating the ruleset himself.
Keith mentioned this last year on his Pinball Profile interview:
http://www.podcastgarden.com/episode/ep-20-keith-elwin-7x-worlds-greatest-pinball-player_98431
Hopefully, plans haven’t changed since then. I’m sure he will have other coders on his team to help transcribe his ruleset into the actual code language.