Mario is actually one of the most hated Nintendo franchises! It gets more hate than other big Ninty franchises like Pokemon, Zelda, Metroid, Animal Crossing, etc..

Skyword Sword makes sense to me. Got ignored by Nintendo fans, so they'll give it another chance before Zelda HD comes out?

But he also gets way more attention.

Pokemon gets also hated a lot for being the same every year.

If it's Majora's Mask I expect really good graphics.

Mmm, I would like it to be a gamecube era game, everything from before could be too time consuming and expensive to remaster and I don't want anything from the Wii that is too recent and the console is backwards compatible anyway... with that in mind.

Eternal Darkness HD (please, please, please)
Baten Kaitos HD collection
F-Zero GX
Final Fantasy: Crystal Chronicles
Luigi's Mansion 1+2 HD
Wave Race: Blue Storm

MM will for sure be for 3DS (It needs some love too) It is probably easier to remaster for 3DS.

Zelda U will probably not be ready for christmas 2015 and has to be substituted with some other BIG Nintendo franchise. Galaxy is the biggest. Galaxy with online, miiverse, new missions, Co-op with gamepad, Amiibo functionality = charachter roster.

I suspect MM.

Also... cash grab!

Majora's Mask can not be, Zelda Wii U comes out in 2015, Nintendo has never released two games in the Zelda series in the same year for the same platform.
Probably Super Mario All Star HD or Super Mario Galaxy 1and 2 HD remaster. Or even a remake of Super Mario 64 with multiplayer and HD graphics (I think there was a rumor of it). Besides the more, 2015 is the 30th anniversary of the Mario Brothers series.
Metroid Prime Trilogy, I also wish it was a possibility.

But my preference was even  Super Mario All Star complety HD with 3D graphics.

They want to have a game each month, so I guess they've gotta do what they've gotta do. 

Awesome! I want so many N games remade for Wii U. Make a remake of Metroid Prime Trilogy, cut the price by approx. 50 Euro at E3 and you have a console sold. Release Metroid Prime Trilogy HD ans Xenoblade HD and I might even buy it without the cut

Other titles would include Xenoblade (hell yeah for an HD version!), The Last Story (though I'd rather play it on Vita ), Ethernal Darkness, Zelda TP (this one would benefit most from an HD remake), SS (this one would repeat the average sales of WW remake though, as every cartoony Zelda), MM (this one probably fits 3DS better, though) and Mario Galaxy games.