I think Yoshi will sell well maybe having LTS of 2.5m ,but i think Splatoon will sell more, having that multiplayer element .
'XX'' looks amazing but i think it won't sell as much as Yoshi , maybe getting to the 2million mark. It's a niche RPG unlike Zelda and i think is reliant on sales from those that have played the first game on Wii and on the New 3DS..
Yoshi i think is a much more diverse game then DKTF. I played both in demo form at events and Yoshi is a must purchase for me, DKTF i still have not purchased , i was not on the edge of my seat when playing it. also rumors of it being a really hard game later on put me off. As i like medium difficulty games and when they get so hard that your there on the same level for weeks ,i just can not be bothered anymore. DKTF is a game i would buy used for under £15 ,but no more.