I'm more excited for DS2 than Zelda, we know they wanted to launch the game this year, and delays are not excluded.
While if Iwata starts speaking of the new handheld probably it will not launched later than 2012 (some people were claiming 2013-14) and likely at hte end of 2011; but this doesn't cut out DSi, it will sell even after the new portable console like GBA did.