Last generation, Nintendo revisited two Zelda games from the GameCube era, and the result was HD versions of Wind Waker and Twilight Princess. Skyward Sword, the next console Zelda in line after those two, has not yet received the same treatment. Many have speculated that this could change on Switch, with the Joy-Con controllers replacing the Wii Motion Plus controllers originally required for the game.
Nintendo has yet to make any official announcement in this area, but according to recent rumblings from Japan, Zelda producer Eiji Aonuma just threw some major fuel on that flame. According to numerous attendees of a recent Zelda concert in Osaka Japan, Aonuma addressed the crowd and said "We know what you are thinking. Skyward Sword on Switch, right?"
While we obviously can't confirm that this occurred, it's being claimed by many different people who attended the concert, so it seems likely to be true. We also know that the Zelda development team once experimented with some concepts for Skyward Sword HD years ago, so there's definitely been interest on Nintendo's end.
Could we see an announcement soon? With The Game Awards just around the corner, it's certainly a possibility. Personally, I'd love to see a bundle with the HD versions of Wind Waker, Twilight Princess, and Skyward Sword all packaged together.