Oh, that was you? That's funny; at the time, I was basically passing over all other usernames except the "leaker's," so I must have missed it. But from what I remember, you worded the post strangely, as if it were out-of-character for Sakurai to not add third parties when he's explicitly claimed in multiple interviews how tough they are to manage and how we shouldn't expect many of them.
Link and Toon Link are quite obviously different in appearance, far moreso than Marth and Chrom, so I don't know why that's being discussed as a red flag when it's clearly another example of reaching. And while Sakurai specifically wanting international retro characters is quite odd, it's not out of the question that he'd want a more sizable amount of audience exposure to a decades-dormant character who's already going to be unknown to most players, moreso than those from larger series like Fire Emblem or Mother.
Again, I'll say that my biggest reason for doubting this as of now is that the guy has an answer to literally every question you throw at him. That's a pretty great indicator that he's making stuff up on the spot, and just happens to be eloquent and in-tune with the fanbase enough to pull it off in a somewhat convincing manner...at least until the "Sakurai is a d**k" narrative comes into play.