I won't be saying anything Iwata hasn't already said, but
lots of big games in Q3-4 supplemented by a huge ad push on tv and other media outlets. if any one of these games makes waves (Retro's game has the best chance imo, though Mario, Mario Kart, and Wii Fit also have a chance) sales could increase significantly.
There is so much we don't know that it's silly to target me so heavily for saying 10 million is a possibility. We don't know their release schedule, nor do we know about any surprises that may be in store, ala Wii Sports U.
This is why a 10 million target by year-end isn't reasonable:
Let's assume the "launch period" for the Wii U was the period from its release (late November) to March 31st, 2013, when the FY gets released--four months. So, the Wii U, in its LAUNCH PERIOD, managed 3.46 million unit sales in FOUR months. 3.46 million unit sales at 4 months = 865,000 average worldwide per month
In order to hit 10 million by December 31st, you would have to achieve an average monthly unit sales of 726,667. So Nintendo would have to sell an average of 84% the rate it sold DURING THE LAUNCH PERIOD in order to make a 10 million goal by end of year. That's an incredible sales retention that isn't going to happen.
Why?
The Wii experienced a sales retention of 142% for the 9 months after its first FY quarter compared to its launch. In essence, the Wii U would have to be performing 59% as well as the Wii did in order to hit a 10 million target.
But that's a situation where:
* The Wii had ridiculously fantastic, word-of-mouth marketing
* The Wii had instantly recognizable IPs that drove system sales through the roof on the outset
* An initial massive hardware shortage that drove up consumer demand to rabid levels
It will be three months into the new fiscal year come this E3, and Nintendo will not have put out ANYTHING that has captivated the imagination of the audiences. So that's already three months lost (out of their nine month window). And not only that, but the Wii U has problems that directly counter the Wii's boons:
* The Wii U has horrible, confusing marketing and DEAD word-of-mouth appeal
* The Wii U has IPs that, while fun and engaging, don't sell the system sufficiently and aren't even close to being as iconic
* No hardware shortages at all with plenty of stock on the shelf, and dwindling hardware demand from retailers
That's way too many problems to fix to try and meet even 60% of the Wii's success by December 31st.
AND, even if Nintendo just announces derivative IPs like Mario Kart and 3D Mario U and Wii Sports U, there's always the NSMB perception issue that could plague rapid hardware adoption.