i don't think it's possible to mold snk into a company that's relevant to modern gamers unless you're going to turn metal slug into a first person shooter.for this to happen,snk needs to push most of there existing titles aside and create new ones that can compete with mainstream games.
take capcom for example.back in the day, capcom wasn't all that different from snk. they were heavy on the 2d fighters,beat em ups and shooters.then came the 2000's and capcom pushed all that aside.games like street fighter,vampire hunter,marvel vs games took a rest so they can introduce devil may cry,resident evil 4,onimusha,monster hunter and okami. snk would have to take a similar approach. but i don't think they can afford it financially.