Square Enix says Front Mission Evolved is a spring 2010 game. Xbox.com says something else.
According to the Japanese product page, Front Mission Evolved is due in stores on February 25, 2010. It seems like this release date (leaked date?) is just for Japan, though. The US and UK pages have a “TBD” target. Double Helix’s Mechwarrior-like Front Mission game will compete on sales charts with No More Heroes: Heroes’ Paradise and Borderlands, if it’s released then.
Source: Siliconera
I don't know whether February means just Japan (though with it being on the Xbox site I doubt it) but considering FFXIII is out early March it's probably not a wise move to release it then - if it is released worldwide.