The news comes from CoroCoro comics, which has a spread on the miniature robot battling game. In bold typeface, Corocoro says 2011. Smaller print pegs the game’s release date as March 17, 2011 for Japan.
While The Little Battlers has not been announced for North America, Level 5 has an office in North America. We imagine they must be localizing some of their own titles, perhaps, The Little Battlers.