Metroid: Other M and Super Mario Galaxy 2 should be hitting stores between June and August.
Nintendo Australia announced that Metroid: Other M and Super Mario Galaxy 2 aren't holiday releases and are coming out between June and August, according to IGN.
This reveal isn't entirely unexpected, as Metroid: Other M was listed as "Summer 2010" on a Japanese release schedule that was released in January. On that same list, Super Mario Galaxy 2 was slated for a more ambiguous 2010 release.
There should be concrete information about Metroid: Other M and Super Mario Galaxy 2's North American release dates tomorrow at Nintendo's Q1 Media Summit in San Francisco.