Would have said Xenoblade Chronicles not too long ago but, yano.
I want to say Xenoblade Chronicles X, but I don't really know how much would really need 'remastering'. A low effort port would pretty much work for that, it's not too old and the Switch hardware isn't a significant enough boost over the Wii U to make it look much better. Maybe have all the cars and stuff be solid objects rather than astral projections from the shadow realm? I know XCX had various install options because of the Wii U's crappy standard hard drive size
(not that the Switch is much better) which made certain features work better depending on which tier you installed, maybe a remaster would better optimise everything and include just a single install. Maybe also put back in the breast sliders so my character can be flat chested the way God intended and just make it so skimpy outfits and sliders are disabled for Lin
(or Japan could just stop being weird and trying to make little underage girls sexy). I kinda just want to play Xenoblade Chronicles X again but would also love to shove my Wii U in a cupboard given everything else I really want to play on there has been ported or gotten a sequel on the Switch.
Skyward Sword as well. I didn't mind the motion controls. In fact, I would go as far as to say removing the motion controls would be removing a large and unique aspect of the game which worked incredibly well...But I've also never finished Skyward Sword, I don't think I even managed to get to the first proper dungeon thanks to the incredibly outdated hardware of the Wii making the visual quality absolute trash. I couldn't even play it for an hour at a time without getting literal migraines. It was literally painful to play for me and a higher resolution from a port would absolutely remove that issue.
I almost want to say the Wii is too new for re-masters... but anything is fair game I suppose.
The Wii wasn't much more powerful than a Gamecube. It wasn't far away from just being a Gamecube with a different control input really. I would say the main reason Wii games even do still look as good as they do is more down to how powerful the Gamecube was rather than anything they upgraded with the Wii.
That said, the visual quality in terms of resolution for some of the Wii games is REALLY behind what the competition were doing at the time with the other systems pushing HD, later revisions of those consoles ONLY being HD. Having never owned a Wii and playing these games for the first time on the Wii U, it only stood out more how much these games had aged when earlier released games on other systems like Heavenly Sword or Halo 3 had crystal clear picture quality.
Wii games don't look as good as some of them deserve to, maybe aside from emulation which can enhance a game beyond what the original hardware was able to. I've already mentioned my struggle and discomfort trying to play Skyward Sword and whilst I didn't have the issue to the same extent with other Wii games, it was still jarring for me to be going back and playing these fuzzy old 480p games when almost the entirety of my technology was in HD at that point
(3DS being the exception, but also on a much smaller screen).
Mario Galaxy, Donkey Kong Country Returns, Metroid Prime trilogy
(which I believe is already "supposed" to be a remaster), Skyward Sword, No More Heroes. I'm not in view of my game collection to name more, but I think a big reason I'm struggling is because games like Twilight Princess, Wind Waker, Okami and Xenoblade Chronicles have already gotten/are getting remastered, and the difference is night and day despite how good the originals already looked, again, because graphically/artistically the games hadn't aged, the hardware did.