I could be wrong, but I have anticipated Nintendo going for a very compressed launch; and by that I mean that they will try to reduce the time between announcing a system and releasing it. The reason for this is that announcing the successor to the Wii will likely have a substantial impact on hardware sales for the Wii, especially during the Christmas season.
While it is an unconventional approach, if I was in charge I would announce the system early in the year (most likely in March) with vague details, release a teaser video halfway between the announcement an E3, demo the system with its full line-up of launch games at E3, and release it 6 weeks to 3 months later. There are two reasons for this approach:
- By compressing 18 months of pre-launch announcements into 6 months, you will create a much more exciting build-up to the release of your system; and this can (potentially) act as free marketing.
- By releasing several months earlier in the year, you can satisfy initial demand and have an adequate supply to capitalize on the holiday shopping season.