I think Ubisoft changed their projections because 500k is an easier target to reach and surpass. It's similar to when Capcom had a 400k projection for the sales of Resident Evil 4 Wii edition. The sales were easily passed. This looks good to share holders and gives them more faith in the company and the strategies that they are undertaking.
I'm pretty sure Ubisoft is hoping that this game is a block buster in terms of sales.
If Nintendo is successful at the moment, it’s because they are good, and I cannot blame them for that. What we should do is try to be just as good.----Laurent Benadiba