Depends on how you define important"

The HD Zelda remakes would be nice to have on a real console.

It's notable that there is still a Kirby game stuck on the WiiU.

I've heard good things about Nintendoland but I've never played it. Still, that's kind of the soul of the WiiU so might not be likely to get ported.

Paper Mario Color Splash is notable, though I don't think it sold well. If they ever do a compilation of the second wave of Paper Mario games it'll probably get included.

I liked Pushmo World. I wouldn't mind a new entry in the series, though as a puzzle game the line between sequel and remake is kind of blurry and irrelevant.

Sega loves to do Sonic compilations so I would guess Rise of Lyric would get re-released at some point.

There's the infamous Star Fox games. Nintendo has been known to re-release old games that were obscure, sold poorly, or were just plain bad before. But I wouldn't expect that for a decade or two. Either as part of a compilation or hidden away with a bunch of other games on a digital storefront.

Devil's Third may end up as lost media someday. The spinoffs probably do too. Pokemon Rumble, plus the "party" and "sports" games.

If you don’t count Mighty N°9 /s

I think so? But I might be forgetting something.