I think it will push hardware forward somewhat. A boost during the week of its release and will contribute toward future sales when other flagship titles are released. Having said that it won't revive MK8 momentum and Wii U will still suffer continual decline until november.
Saleswise I would say 600k. I think the Wii U's audience will be a bit concious of it because the lack of AAA titles and it may very well end up the highest rated game of the year.








