I don't see Nintendo doing opportunistic remasters like Mario Kart 8 and SMash Bros, those games will have replacements within the NX's 1st 2 years. Considering both teams had to previous develop 2 seperate titles for handheld and console I think we'll probably see Smash 5 and Mario Kart 9 even sooner then that. At least 1 might be a launch window title.
Difference with single player, campaign based games like Zelda is that sequels are in no way replacements so its important they make previous entries available to current consumers.
To answer the question though, assuming NX isn't backwards compatible:
-Xenoblade X remaster
-Pikmin trilogy
-Mario Collection (including 3D world)
-Pokken
I think the campaign from Splatoon 1 will come with Splatoon 2, which I think we'll see in 2017.
