When is Pokemon going to be out?

(I am American so my answers are American too)
Pokemon Platnum Came out on March 22, 2009
Pokemon HeartGold and SoulSilver came out on March 14, 2010

Pokemon Black and White are said to come out in Spring 2011 and I'm Gonna Guess March 2011 cause they sorta have had a tradition of Marches for America