In my younger years as a gamer, E3 was not the biggest place to learn about Nintendo. It was their annual Spaceworld event. It was here that they would reveal many of their new consoles, handhelds, and major game releases. It is being rumored that some sort of big event, not exactly Spaceworld is going to happen again.
At this time no one really knows exactly what is truth, and what is not. It may just be an opportunity for them to show Japanese press what they showed at E3. Either way, I’m sure we’ll find out something sooner rather than later.