Even that is not a believable rumor. I don't think they could find a buyer that would leave the company intact the way it is right now. They have very diverse divisions. Super rich ones like Tencent might be the only option.
Not just that, there would be much more than that to be saved. I don't wanna imagine all those Taito franchises rotting in the corner along with other Sony legacy names. Bubble Bobble, Bust-a-move, Space Invaders, awful lot of stuff to be disappear completely.
Also Team Asano and Team DQ would not be the only divisions that Nintendo would save: Team Kawazu (SaGa), Team Mana, Remaster Team, Tokyo RPG Factory they all would have no future under Sony. Maybe even Nomura himself too, he's been assisting Xenoblade designs for Monolith. In fact, main FF teams might be the only ones Sony would end up with after the exodus.