Nintendo has never talked a lot about their upcoming games. First, I was tired of waiting about some info and then, I felt it was ok like that. When Iwata said about the DS2, I was like "Wow that's exciting!" and my excitement get bigger and bigger when he told about Zelda Wii being released in 2010.
Sincerely, when Nintendo don't talk too much on a title, I only get more and more excited about it and when they finally give some details, I can't enjoy more that moment! Are their strategy great for you?