Saw this over at MyGolfSpy.com, it’s a crude drawing for a patent application that Nike Golf filed for:
The idea is that the adjustability of the clubs would allow for the golfer to make any club either a cavity back design or a muscleback design. So if you want an entire set of cavity backs or musclebacks, that is possible. Or if you want a split set, more forgiving long irons and more blade like shorter irons you can do that.
I don’t particularly hate the idea, although I wonder how well the muscleback version would perform.