Nah they'll be fine, at the end of the day they are making money from this all in all so its not to much to be concerned about
How is it not concerning, their consoles are no longer viable sellers. What do they do next given wiiu abysmal sales ? The next one if there is one will follow the lowset selling Nintendo consoel ever, any business plan following it will be hard to justify especially the 3rd parties are truely done with supporting then consoles.
Nintendo came back from the GC, so yeah... there isn't much to be concerned about.
With a fluke fad ? not strenght of their own merits proven by their incapability to replacate the success agian. I dont doubt they will find success agian, neither would i doubt ill be as a 3rd party.