MRKs on 15 August 2014
I don't think it will be a Zelda game, since the Zelda "U" will probably release in 2015(unless they delay the game)
Also I don't think is either super mario since there is absolutely no need for a remaster of a mario game (we get one every year)
That aside, I do think its probably F-Zero GX or (wishful thinking) Metroid Prime Collection Remaster with Hunters in glorious HD for online play. Yes, I ask for too much
3DS FC : 4339 - 3326 - 7693. Add me :) Nickname Tin
