I am please to provided the following list of companies and Games that are currently slated to make an appearance at E3.
Atari
Dragon Ball Z: Budokai Tenkaichi 3 (PS2, Wii)
Godzilla Unleashed (DS, PSP, Wii)

Capcom Entertainment
Mega Man Star Force: Dragon (DS)
Mega Man Star Force: Leo (DS)
Mega Man Star Force: Pegasus (DS)
Mega Man ZX Advent (DS)
Phoenix Wright: Ace Attorney Trials and Tribulations (DS)
Resident Evil: The Umbrella Chronicles (Wii)
Zack & Wiki: Quest for Barbaros’ Treasure (Wii)

Codemasters
Race Driver: Create & Race (DS)

?Crave Entertainment
Brunswick Pro Bowling (PS2, PSP, Wii)
Dave Mirra BMX Challenge (Wii)
Napoleon Dynamite (DS, PSP)
Pinball Hall of Fame: The Williams Collection (PS2, PSP, Wii)
Spelling Challenges and More! (DS, PSP)

D3 Publisher
Ben 10: Protector of Earth (DS, PS2, PSP, Wii)
Naruto: Clash of Ninja Revolution (Wii)
Naruto: Path of the Ninja (DS)

?Disney Interactive Studios
High School Musical: Sing It! (PS2, Wii)
High School Musical: Makin’ the Cut (DS) Electronic Arts
Boogie (Wii)
Madden NFL 08 (Cube, DS, PC, PS2, PS3, PSP, Wii, Xbox, X360) NEW!
NBA Live 08 (PS3, Wii, X360)
Need for Speed ProStreet (DS, PC, PS2, PS3, PSP, Wii, X360)
Tiger Woods PGA Tour 08 (DS, PC, PS2, PS3, PSP, Wii, X360) NEW!

Gamecock
Dementium: The Ward (DS) NEW!!
Insecticide (DS, PC) NEW!
Mushroom Men (DS, Wii) NEW!

LucasArts
LEGO Star Wars: The Complete Saga (DS, PS3, Wii, X360)
Star Wars: The Force Unleashed (DS, PS2, PS3, PSP, X360)

Majesco Entertainment
Fish Tycoon (DS) NEW!
Holly Hobbie & Friends (DS) NEW!
Nancy Drew and the Deadly Secret of Olde World Park (DS) NEW!
Operation: Vietnam (DS) NEW!
Turn it Around (DS) NEW!
The Wild West (DS) NEW!

Natsume
Harvest Moon 2 (DS)
Harvest Moon DS Cute (DS)
Harvest Moon Wii (DS)
Math Play (DS)
Puzzle de Harvest Moon (DS)
River King: Wonderland (DS)
Rune Factory: A Fantasy Harvest Moon (DS)

Warner Bros. Interactive
Looney Tunes: Acme Arsenal (PS2, Wii, X360)
Looney Tunes: Duck Amuck (DS)

?The complete list can be found here.? These are just the nintendo games at present time