Ekkk, This sounds horrible :p
Nintendo doesn't need Sony and vise versa.
If this was to happen (which would make zero sense for both Would only benefit sony), Sony would benefit more then Ninetndo. Western third parties parties are not making games for any handheld and thats not gonna change unless sony releases a phone hybrid and even then it will just get ports. Japanese 3rd party devs are already behind Nintendo, so little to be gained from sony contributing towards their handheld. What will sony other which other vendors can't? At the current state of business Nintendo is better off using samsung etc
Mario, Zelda etc being on PS4 would make it impossible for Microsoft to compete in any market. PS4 would outsell it 4:1. But why would Nintendo do that if they have chance at producing a successful homeconsole, making money off the hardware and then recouping all software venue without paying sony a license fee.







