Gender locked race?

[Beckett]

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Some cynical marketing math

Reveal female Viera: Big points!
Later reveal male Viera: a few points

VS

Reveal female Viera: Big points!
Later reveal an entirely new playable race: Big points!
(but both races are gender locked): some lost points
6.0 announced, reveal male Viera and female of the other race: Big points again!

They can get more hype out of two gender locked races than they could from just unlocked Viera. Plus down the road they can say they "listened to the fans" and add the missing genders for even more hype.