Today, Nintendo of America announced its software title line-up for the first two quarters of 2005 for all three of their platforms: GameCube, Game Boy Advance and the soon to be released Nintendo DS. While the company says more titles will be announced, here is a list of announced titles so far, covered by RPGFan:

For GameCube:
Virtua Quest, Sega, January
Fire Emblem, Q2 2005

For Game Boy Advance:
The Legend of Zelda: The Minish Cap, January 10th
Pokemon Emerald, April
Fire Emblem 2, Q2 2005

Update: According to a source, Fire Emblem 2 will indeed be the most recent GBA installment, Seima no Kouseki, which was released last month in Japan.

Nintendo also still has a new Advance Wars title for the DS in development, as well as The Legend of Zelda for GameCube. Neither has a release date yet.