Probably, but I'm guessing they're waiting for a momentous occasion in the Zelda world, similar to the Mario anniversary. Maybe for a Zelda anniversary or game release? But I'm willing to bet we'll get them eventually- maybe not exactly the same items as we had in previous games, but a mix of old and new and some missing like the Mario ones.
Personally, I'm less interested in them then I was in the Mario ones. But I've never been a huge Zelda player (BoTW is great, and I've played some previous games, but I don't generally like RPGs that force me to play as dudes) and I personally think the items just look super out of place in the cartoony world of Animal Crossing, whereas Mario ones fit quite well. I mean, I'd still collect them, but I'm cool with or without them.