Nintendo will show at E3:
Dance Dance Revolution Mario Mix
Donkey Konga 2
Mario Party 7
Pokemon XD (a full-blown RPG)
Super Mario Strikers (a Mario soccer title)
The Legend of Zelda: Twilight Princess (Formerly listed as The Legend of Zelda)
Mario and Luigi 2
Mario Kart DS
Metroid Dread (a new 2D Metroid title)
Metroid Prime Pinball
Donkey Kong Country 3
Fire Emblem: The Sacred Stones
Mario Tennis Advance (in development at Camelot)
the new Zelda has a final title which is a bit odd though(?).
Mario and Luigi will appear on DS also.
wtf is "Nintendo Tetris"?
"Battalion Wars" for gamecube will be the cube realtime-action version of "advanced wars" I think.
side-note: This list is NOT complete