Admittedly I've just started musing a scenario, I don't expect it to happen. But we might be at the point where Toadette has some light for everyone who has wanted a playable Toad of any kind. We already know Toadette has been appearing in most new Mario games, hell even being the fourth wheel in an at max 4 player Super Mario Maker 2 and outright replacing one of the Toads in the NSMBU port (You can change between Yellow and Blue, but I believe you still can't have Yellow and Blue on the same screen) and not to mention an exclusive form for her in Peachette. I probably wouldn't be surprised that if there's any new characters in the 3D World port, Toadette might be the first new character announced or even the only additional character.
Imagine a scenario where history repeats where a new character that was added to Super Mario 3D World ends up also being in Smash. That was Rosalina back in Smash 4. Again, I don't think it will happen as Toadette seems like an odd choice to make people pay for and a point against this is that Rosalina was in the base game, and even if there is a Mario character in the pass, you'd think it'd be Geno or Waluigi. I've always initally thought Toadette would have to be an alt if Toad ever got in, but at this point the way Nintendo has promoted Toadette the past 2 or so years... It's looking more likely Toadette could actually be the default Toad if the stars align somehow for a playable Toad in Fighter Pass 2.
I don't even expect a Mario character being in this pass at all, but if there is. And it's not a choice that most people here would expect, Toadette could be this thread's dark horse waiting in the wings.
I'll be honest, I'm not sure how to feel about Toadette.
I like her a lot as a character in the Mario series(and am glad she's now one of the main platforming stars) but in terms of Smash it's a trickier issue.
Could Toadette be the default skin and Toad the 'Alph' of the duo? Maybe. Bit odd, like adding Luigi before Mario, but it
could happen since she's been elevated to her various Toad partners level in the Mario series.
But presumably if you're going to push Toadette over Toad(or Captain Toad) you're doing it in order to use her unique Peachette form...and that's something Toad(and Captain Toad) can't do, which would probably rule them out as being alt skins immedietly, thus stopping him from getting in should she do so.
I like Toadette, but at the expense of Toad, that's a no go from me chief.
If Toadette is the default skin and Peachette is ignored entirely allowing Toad in as the 'Alph'? That's something I can get behind, but in doing so it robs Toadette of her one unique ability...