Super Mario Galaxy 2 hits North America on May 23, Nintendo of America's Cammie Dunaway told a group of writers gathered in San Francisco for the Nintendo Summit this morning. First revealed at E3, Super Mario Galaxy 2 is said to have 90 percent new levels with the rest being levels from the original Mario Galaxy with different objectives.
Nintendo announced New Super Mario Bros. Wii just a month and a half ago at E3. They showed us the characters that were playable when they were demonstrating it. Characters that were used were Mario, Luigi, and two toads. Sadly to know for some, of what Shigeru Miyamoto provided in Nintendo Power, he stated a brief "that's it" response when he was asked if any more additional characters were going to be playable that wasn't revealed in the videos and screenshots.
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I think the headline is supposed be May 23. :)