So, something I was thinking about...
Before Smash 4, Sakurai made a point about wanting more female fighters in the franchise. If you stop to think about it, in Brawl we only had Peach, Zelda, Sheik (and she's controversial in that aspect), Samus and Samus 2, and half a fighter in the form of Nana. Only one more female fighter than in Melee, and it was Samus without a suit. Yay representation! So in 4 they added a lot more of female fighters: female!Wii Fit Trainer, female!Villager, Rosalina, Lucina, Palutena, female!Robin, Bayonetta and female!Corrin. Quite a lot of them, in fact more female newcomers in one game than all the female characters we had had so far.
But in Ultimate, so far we only have female!Inkling and Daisy, 2 out of 8 characters. 3 if you want to count Dark Samus, although DS is more an it than a she. And if we take a look at the List of Most Requested Newcomers By Smash Bros. Fans™, there are not a lot of female characters in there: Dixie Kong, Isabelle, Shantae, Medusa, Elma... Kazooie? Versus a myriad of tough guys (Isaac, Geno, Skull Kid, Rayman, Shadow, Sora, Bandana Dee, Rex, Crash Bandicoot, Black Knight, Ken, and a long etc.). And some of the most popular female choices have already been deconfirmed (Krystal, Ashley, Midna, Lyn...).
I don't know if Sakurai's is going to try to add more female characters to the roster or if he feels satisfied with what he did in 4 and thinks that that's enough. But fact is, if he wants to add more women to the cast, his options are more and more limited each time. Which doesn't talk well about female representation in Nintendo games and gaming in general, to be fair.