I know it may seem far out but Nintendo doesn't have to make a console and sell it at a loss to get into a dangerous situation..
For instance.. if Nintendo goes in with high expectations and sells horrible in both markets it would still be a bad situation..
regardless of their console being profitable.. lower revenue means lower profits.. I don't know how much they would have to pull in to stay afloat so I won't go much further into that but im sure they have expenses and if they fail to meet them they won't wait until they lose billions of dollars to start considering a third party transition..