As far as the options in the poll go, a lot of them at this point in the system life should be getting a new game instead of taking more from the Wii U's library.
A new Paper Mario, Pikmin, Fatal Frame, Nintendo Land, Mario vs Donkey Kong, Wonderful 101, all are possible to just expand and polish ideas or are already iterative franchises. NES Remix would be cool to add onto the NSO service as an extra incentive for the library.
Xenoblade Chronicles X I would like a sequel or a complete edition of the first game, there are so many plot points and missed opportunities that feel like they should have been on the game in the first place, on top of really obvious sequel bait. I just really want some closure on that world.