Street Fighter X Tekken release date announced
October 17th, 2011
Street Fighter X Tekken
http://www.capcom-unity.com/snow_infernus/blog/2011/10/14/street_fighter_x_tekken_release_date,_gem_system,_and_special_edition_revealed
Capcom Unity blog
Speaking at Comic-Con in New York last week, Street Fighter X Tekken producer Yoshinori Ono revealed that the game will hit North American shelves on March 6 next year. The game will launch in Europe shortly after on March 9.
As well as the release dates, Ono also confirmed that a special edition of the game will be available in the US which includes a build-it-yourself arcade cabinet (unfortunately, it's not full size, but still a good 5" high when constructed).