The Legend of Zelda: Oracle of Ages and Seasons is expected in the west before end of northern spring, series producer Eiji Aonuma has said.
In a Wii U MiiVerse post reported by GameInformer, Aonuma said the 3DS port of the Game Boy Color classics is coming to territories outside Japan before northern summer.
Oracle of Ages and Seasons originally released as two titles, and players could share content between the two; this feature apparently still exists in the bundled update. You need to finish both to access the full story.
The re-release arrived in Japan in late February via the 3DS eShop's Virtual Console. The original games released worldwide in 2001.