Small correction for your 4).
Ken Levine may have been part of the small video clip Nintendo showed at E3 but he has recently announced that he has no plan to develop any game for the Wii U. So looks like it was just a tad too early of an announcement...

Here is the article where he says it :
http://www.gamasutra.com/view/news/35812/Levine_Irrational_Currently_Has_No_Plans_For_Wii_U.php

i'm aware he's so focused on working on infinite and possibly the vita title that he has no plans currently, but that may change later on since he says hes interested in the console

"E3 saw an absolute barrage of announcements related to Nintendo's Wii U system. Now that the dust has settled and new groundbreaking announcements about the Wii U aren't likely until Tokyo Game Show '11 at the earliest, and maybe not until the Game Developers Conference next year, we can take stock of what we know about the system so far. Here are the top five things we think are positive indications for the system as we know it today."

1. Nintendo's Evergreen IP

"Perhaps Nintendo's greatest strength over the decades has been its own consistency. As a developer, they've maintained a high level of quality for all of their major franchises, particularly Super Mario and The Legend of Zelda. While there was doubtlessly a glut of 'shovelware' foisted onto the Wii by third-parties, Nintendo's quality was always impeccable with the quality of titles like Super Mario Galaxy and The Legend of Zelda: Twilight Princess. On the other hand, they've also developed fresh titles that have appealed to the masses in a whole new way, like the Wii Sports and Wii Fit titles. They have the recipe of success, and that's also one of the more consistent complaints about Nintendo products – once they've established a franchise's formula of success, they're reluctant to stray from it. From a business perspective, that's irrelevant – people come to Nintendo platforms for a certain sort of experience that Nintendo has been able to deliver over the years, and who's to argue with millions upon millions of sales, really?

good points