Currently Online 
As for what we know right now, the current president seems to be doing a good job.
I would:
Ease into mobile. It's too up and down to be your bread and butter.
Hire someone with extensive industry contacts to lead developer/publisher relations in the west.
Open a new developmental/publishing arm aimed at an older demographic. It would be wholly owned by Nintendo but with a separate branding so there would be no confusion with parents. Think Miramax when it was owned by Disney.
Hire a new "face" of the company. Make them Vice President of Public Relations and have them be as "gamer friendly" as possible.
Have my new consoles play everything under the sun. Browser games, mobile games, handheld games, MMOs, and F2P titles. Handheld and home console would share as much as is feasible.
Build an in-house team with the task of analyzing everything that is popular or well-received in the industry. They would stay on top of all trends and propose new features and areas of potential growth.
Build an open-air hot springs connected to headquarters.
