Another day, another datamine. This come from John Austin Plays, who has posted a lengthy video where he is looking at everything that's already in the remake for the upcoming amiibo. (Be careful, there is a spoiler in this video about a previously unannounced feature, which I'm also discussing in the latest entry of my blog series.)
Unsurprisingly, you can already spoof NFC chips to obtain the "Fairy-Kid Mask" and the "Princess Mask". It's also nice to see them action, where they create a third headgear slot in the equipment menu. So, with amiibo you will be able to carry two masks at the same time: one borrowed from the Happy Mask Shop and one obtained by scanning your amiibo.
However, there are already lines of text in the game for a third masked unlocked by amiibo. It doesn't seem like you can summon it already, so it may need another update to the game to function, but based on the messages you can make an educated guess what this mask is all about: it's likely Majora's Mask itself.
And this would mean that we're getting a Skull Kid amiibo at some point in the future. It doesn't have to be in 2027, because Nintendo plans these things a long time in advance. For example, there were skins for the Metroid amiibo found in Metroid Prime: Federation Force, one year ahead of its release alongside Metroid: Samus Returns. Likewise, the Mineru's Construct amiibo, which came ou two months ago, was already supported in Tears of the Kingdom since June of last year.
Still, I wouldn't jump to conclusions here and expect a Majora's Mask remake to be already so deep in development that it will get released within the next two years. It's a possibility, but I wouldn't hold my breath. It's also possible that they may announce a couple more amiibo for the 40th Anniversary, which just so happens to include Skull Kid, alongside other characters, like Fi, or Zelda & Tri.
But if they were remaking Majora's Mask as we speak, then you would think that they'd save a Skull Kid amiibo for that game. After all, that is a wish that Aonuma already had with Majora's Mask 3D (source), where for some reason they didn't get the obvious idea of using amiibo to obtain additional masks back then.








