The official Corocoro Ichiban website has announced that the 5th issue of the magazine for this year will include a chapter from the new manga series, Pocket Monsters Special HeartGold SoulSilver. The issue of Corocoro goes on sale March 25th, 2010 for 690yen. A three page preview was showcased in the previous issue of Corocoro.
Source:
http://www.corocoro.tv/coro1/next/