I think they're just messing with us. It's safe to assume that everything we see at Fanfests is probably completed just a few days before the conference, considering how tight a schedule they run. I think it's most likely that the male viera model was just not ready and polished enough to be shown in a promotional video, and we'll get a look at them at the next JP Fanfest.

Unless someone asks the devs about male viera at a Q&A or something, it's best to just sit and wait until then.