The Wii collection is coming on September 16 to the United States.
http://www.nintendoworldreport.com/news/30820
Kirby's Dream Collection: Special Edition is coming to North America on September 16, according to Nintendo during their Nintendo Direct presentation.
The collection includes six playable games, including Kirby's Dream Land 1, 2, and 3, as well as Kirby's Adventure, Kirby Superstar, and Kirby 64. It also includes a challenge mode, and a museum that goes through Kirby's history.
