Along with ponytail from gold saurce, there were +1 additional haircuts for both male and female Viera during media tour, which weren't available in benchmark and which are standard haircuts available for other races at the moment.

https://twitter.com/birdofchess/stat...456485379?s=20

It doesn't really give us a lot of info, but considering that media tour usually is very limited in content it provides, there's a chance that Viera will have some (if not all) standard haircuts upon 6.0 release along with unclear amount of unlockable ones. At this point we can only wait and see ourselves in 36 days.