Listed in the latest GI is a listing of Nintendo's latest GC and GBA titles coming out this year and 2004.
Gamecube:
Final Fantasy: Crystal Chronicle- Spring
F-Zero- June 23
Wario World GC (tenative title)- Fall
Kirby's Airland (tenative title)- Fall
Mario Golf GC (tenative title)- Fall
Mario Tennis GC (tenative title)- Fall
1080: White Storm (tenative title)- Winter
Star Fox (tenative title)- TBD
Mario Kart GC (tenative title)- TBD
Pikmin 2 (tenative title)- TBD
Animal Crossing 2 (tenative title)- TBD
Game Boy Advance:
Legend of Zelda: The Triforce Gods and the Four Swords- Spring
Lunar Brace (tenative title)- TBD
Mario Golf GBA (tenative title)- TBD
Mario Teniis GBA (tenative title)- TBD