You may have heard rumblings lately about the return of the Datsun brand to the Nissan family. It's had a lot of us here at Berlin City Nissan of Portland thinking about the future of Nissan - and even more so, the history of Nissan. Well, it turns out we're not the only ones - Nissan President and CEO Carlos Ghosn recently took an historic visit to the Zama Heritage Garage, which up until now…