I'm sorry Robot, but those "leaks" are likely wrong too, and I think your putting more stock into them solely because they're two of only a handful of leaks that actually feature Shantae. I especially can't buy the recent one that said Crash and Shantae, due to them saying that they would be CP7 and 8 instead of 8 and 9. I don't care if people think those numbers are typos and I don't care that I joked about parts of the Animal Crossing stuff winding up being true, I still don't think it's real.
Let me tell you a story. Last year I read a leak on GameFaqs (that sadly I don't think is up there anymore) that was posted I believe in early 2019 that said Joker, Erdrick, Banjo, Terry and KOS-MOS were all in FP1. Barring Erdrick turning out to be part of Hero, they guessed the 1st 4 fighters right, to where I deadass thought that KOS-MOS was last. It didn't even occur to me that they may have just gotten really really lucky in their guesses, and her still being featured in leaks leading up to CP5 just made me all the more certain that KOS-MOS was coming. Obviously, that wound up not happening, and I've been very skeptical of leaks ever since. I will admit though that I do have ONE exception...
I know a lot of people are probably not going to like me saying this, but at this point I don't really care. Vergeben has gotten too many things right over the last couple of years for me to doubt them anymore. They correctly predicted all of Smash 4's roster, Ridley, Ice Climbers, Snake, Ridley, Simon, Isabelle, Incineroar, Erdrick/Hero, Banjo, Terry and even Steve all coming to Ultimate. Some of them may have been made years ago, or others only a day in advance, but they've still been right. Not 100% of the time, I know, like when they said a Square rep would be first for FP1 and it wound up being Joker, but I still put a whole lot more stock in Verge than 99% of other leaks to where they're the only one's I trust (for better or for worse).
The point I'm trying to make though is just be careful. There's a reason why I keep saying to temper your expectations. I didn't do that when it came to KOS-MOS and I wound up wasting my time believing all of those leaks. Just be careful how deep you go into Smash leaks, since like you said, 99% of them are bogus.