General Motors was bailed out in 2009 by the US government because too many jobs were at stake in a failing economy. But there were causalities within GM. Oldsmobile, Pontiac and Saturn were lost. An established name really means nothing anymore.
I don't pretend to know anything about the Japanese economy or the Japanese govenment, but the only way Nikon survives is a propping up by the Japanese government. No for profit business or investor will want Nikon, as camera sales have been tanking for several years with no chance of a rebound. A shrinking market means a shrinking number of participants in said market.
Furthermore, within a few years there will be not more than four major players in the 35mm/Medium format camera game: Canon, Sony, Fuji and Panasonic/Leica. All of these makers will have diversified interests besides cameras. Zeiss will continue but of course does not make cameras. Olympus, Pentax, Sigma, Ricoh and all of the other volume camera makers will be gone. Smartphone cameras will continue to proliferate and dominate the market. If I'm wrong about this, it will be that fewer than four major players survive.
It's possible a nimble, niche company like a Konost could make a speciality product and survive. But most of the volume makers will be gone.