So the Frogger leak, as I'm referring to it as now, not only predicted the November 6 date but also claims certain Mii costumes will be shown off.
If it is true that there are no new reveals in the presentation, as Nintendo is claiming, but yet the presentation includes these specific things:
Mii Fighter Costumes such as Geese, Heihachi, Lloyd, and Hollow Knight.
The stage is called King of Fighters Stadium (while not super hard to guess IS a part of the leak).
A new online mode coming with 6.0, called Slipspace (which we know was datamined at a prior point, doesn't make anything less valid).
Then we're still in the money, and the leak can be seen as potentially legit and accurate, which means Doom Slayer, Geno, and Frogger down the line. (Two of those consist with the recent Mii Costume leak).
Now, I'm not saying to put stock in this leak, but I am saying to keep an eye out during the presentation.
Of course, this is again only plausible if Nintendo isn't lying about the "no unrevealed fighters" remark.