miz1q2w3e on 22 October 2011
While there are some examples of early announcements here and there, Nintendo generally waits till games are far along before announcing them. Your examples are the exceptions not the rule
And I don't consider their announcing Harvest Moon an effort to hype up 3DS, the game just isn't that popular. Them announcing DQX so many years ago is a better example... (although I'm not sure if it was SE or Nintendo who did it)
