Today I saw a screenshot from melo, the same person claiming this leak, saying a little bit more. I forget exactly what they said but I remember Starfox DLC for Mario Kart World being one of them, and they called Wario a "Wario World"
I remember months ago when Star Fox leaked, there was mention of Wario something at least, but they weren't sure exactly what it'd be, Wario Land, Wario Ware, Wario World-style, etc., I think I even remember a random person parroting "Wario Land pixel art remake" and I'm sure that'd be great and all but I have no idea where they heard it from lol (Although, if Wario Land(s) were being remade, I would've liked if they released during Switch 1's life span)
Idk how I feel to be honest if they're saying specific things about Starfox, Zelda, Metroid, etc. but for Wario they have no idea, but I guess now that they called it "Wario World" they mean something like "3D Wario" like when they talk about "Adventures style Starfox"