Just because it hasn't happened doesn't mean it can't.
No kidding. I never claimed that it makes it
impossible for them to be playable.
But that is all the evidence we have, it has never happened, thus chances are that it won't, how big these chances and the changes and whatever the hell else are, that's something you're free to discuss, but their chances have decreased to some degree and that is a fact.
As long as you can accept that, whatever. But taking an extreme position like "DECONFIRMED" or "NO CHANGE AT ALL" is dumb either way.
EDIT: Didn't notice the new page.
Of course it does matter. Anyone who didn't expect Yoshi, Peach or DK to return needs to get their common sense checked.
Newcomers are supposed to be surprises.
Now of course you can claim that seeing Tingle in that screenshot is a surprise, too, but that just doesn't seem like a likely introduction.