Kirby or Pikmin 3 (if IGN are to be trusted and it's an A level game). While they have been announced one way or the other, Kirby has been mentioned only for Japan, and Pikmin 3 has been mentioned once and no more - so both could be considered to be coming out of the blue.
Currently Playing: Shin Megami Tensei: Devil Survivor Overclocked, Professor Layton and the Curious Village
Anticipating: Xenoblade, The Last Story, Mario Kart 7, Rayman Origins, Zelda SS, Crush3D, Tales of the Abyss 3DS, MGS:Snake Eater 3DS, RE:Revelations, Time Travellers, Professor Layton vs. Ace Attorney, Luigi's Mansion 2, MH TriG, DQ Monsters, Heroes of Ruin