An inexpensive and SP-like pro quality mirror-less, interchangeable lens camera with three fast and inexpensive lenses would take over the street photography scene and likely the art and photojournalism niche market - perhaps several markets - faster than Nikon could fill the orders - although that doesn't seem to be a good indicator.
Keys to that are 'inexpensive', 'SP-like', 'pro quality', and 'fast lenses'.
I think a company can put out a camera that will work (Panasonic hasn't done a shabby job at all), but to meet a lot of these criteria, but to hit all these marks, Nikon really needs a home run.
The SP was right after the original Nikon rangefinders that correspondents liked so much they abandoned their Lecias in covering Korea in the early 50's - that made what we think of as "Nikon", Nikon. The lenses were contrasty and considerably cheaper.
There's a chance for Nikon to grow a new customer base and reinforce a old one.
We'll just wait and see.