If Sony decides they need do an acquisition like Square-Enix or Capcom then it can affect Nintendo. I've seen Nintendo Directs sometimes that seemed to be mostly Square-Enix's AA lineup.
I'd suggest Nintendo needs to suspend dividend payments and balloon their cash reserves so they can defend themselves strategically if Sony goes that route. Though I've long felt Nintendo needed to do that anyway since they're a company that can go from feast (Wii) to famine (Wii U), and extra cash reserves can see them through to better times.
Sometimes just a statement from a company that they'd put in a competing offer is enough to persuade the competition to go another route, since it would mean the premium over market value to acquire a company wouldn't be worth it anymore.