I'll post what I believe to be the most relevant ones. Won't post TBAs or already known dates.
Aksys Games:
BIT.TRIP SAGA - End of Q3 2011
Atlus:
Shin Megami Tensei: Devil Survivor Overclocked - August 23
EA:
Need for Speed: The run - Fall
The Sims 3: Pets - Fall
Konami:
Doctor Lautrec and the Forgotten Knights - Summer
METAL GEAR SOLID 3D SNAKE EATER - Winter
Majesco Entertainment:
The Hidden - October 4
Nano Assault - November 15
Nintendo:
Star Fox 64 3D September 11
Kid Icarus: Uprising - Holiday
Mario Kart - Holiday
Super Mario - Holiday
Luigi's Mansion 2 - 2012
NIS America:
Cave Story 3D - August 9
Sega:
CRUSH 3D - September 6
Shinobi - September
Sonic Generations - November
Mario & Sonic at the London 2012 Olympic Games - February 2012
Square Enix:
Heroes of Ruin - Early 2012
Tetris Online Inc.:
Tetris - October
Ubisoft:
The Adventures of Tintin - December 6
Rayman Origins - March 13, 2012[/p]
Gameloft:
Let’s Golf! 3D -Summer
SEGA:
Columns - Summer
Dragon Crystal - Summer
Shinobi - Summer
Sonic Drift 2 - Summer
Sonic The Hedgehog: Triple Trouble - Summer
[/p]
From the official release sheet in the Nintendo press site.
RETAIL
Aksys Games:
BIT.TRIP SAGA - End of Q3 2011
Atlus:
Shin Megami Tensei: Devil Survivor Overclocked - August 23
EA:
Need for Speed: The run - Fall
The Sims 3: Pets - Fall
Konami:
Doctor Lautrec and the Forgotten Knights - Summer
METAL GEAR SOLID 3D SNAKE EATER - Winter
Majesco Entertainment:
The Hidden - October 4
Nano Assault - November 15
Nintendo:
Star Fox 64 3D September 11
Kid Icarus: Uprising - Holiday
Mario Kart - Holiday
Super Mario - Holiday
Luigi's Mansion 2 - 2012
NIS America:
Cave Story 3D - August 9
Sega:
CRUSH 3D - September 6
Shinobi - September
Sonic Generations - November
Mario & Sonic at the London 2012 Olympic Games - February 2012
Square Enix:
Heroes of Ruin - Early 2012
Tetris Online Inc.:
Tetris - October
Ubisoft:
The Adventures of Tintin - December 6
Rayman Origins - March 13, 2012[/p]
e-Shop
Gameloft:
Let’s Golf! 3D -Summer
SEGA:
Columns - Summer
Dragon Crystal - Summer
Shinobi - Summer
Sonic Drift 2 - Summer
Sonic The Hedgehog: Triple Trouble - Summer
[/p]
From the official release sheet in the Nintendo press site.