Nintendo 3DS

Capcom
E.X. Troopers
Gyakuten Saiban 5
Monster Hunter 4

Namco Bandai
Lost Heroes
Naruto SD: Powerful Shippuden
Project X Zone

Square Enix
Bravely Default: Flying Fairy (video)
Slime Mori Mori Dragon Quest 3: Daikaizoku to Shippodan (at last year's show, released 11/2011)
Dragon Quest Monsters: Terry’s Wonderland 3D (released 5/2012)

Level 5
Fantasy Life
Inazuma Eleven Go 2 Chrono no Stone Nebbu/Raimei
Inazuma Eleven 1,2,3 Endōmamoru Densetu
Layton Kyōju VS Gyakuten Saiban (Professor Layton vs. Ace Attorney)
Layton Kyōju to Chō Bunmei A no Isan (Professor Layton and the Legacy of Super Civilization A)

Temco Koei
Samurai Warriors Chronicle 2nd (previously released this month)

Wii

Level 5
Inazuma Eleven Go Strikers 2013 (Wii)

Wii U (Accessory)
Wii U Officially Licensed Wii U Headset (from Turtle Beach)

Capcom
Monster Hunter Tri G HD Version

Square Enix
Dragon Quest X

Other Platforms (Nintendo related titles)

Square Enix
The World Ends With You: Solo Remix (iOS)

Sega
Rhythm Thief (iOS)