Gender locked race?

[Seraphor]

I'm looking forward to seeing Yoshi announce a genderlock live on stage and try to justify it. Bonus points if he calls it a Limited Race

It wouldn't be difficult to justify at all.
Male Viera would be a pretty momentus thing, they have a kind of mystery that's been hyped up over several titles, they're famous for their absence.
Whatever they design them to look like, they won't be able to please everyone, there's been too much build up, and everyone has their own vision of them. So to preserve lore, and their mistique, and everyone's own personal vision of them, they don't release male Viera but we get Hrothgar instead.