Square Enix US has confirmed this evening that it's to release Dissidia 012: Final Fantasy on March 22 in America.
The title was previously confirmed for a March 3 release in Japan. Europe currently remains undated.
The press release the publisher sent out also confirms that Rachel Leigh Cook will voice Tifa of Final Fantasy VII.
Earlier this week, Square Enix Japan announced a premium prologue for the fighter, known as Prologus. It's available now from the Japanese PS Store.
We'll call Square Enix Europe tomorrow morning as regarding a European date.