Well if it is a Beast Tribe, for me we're likely to never see anything more than these models (with a few tweaks for any kind of leader for instance), because that's how beast tribes kind of work.

So I went back to the stream and what put me on that track is what Koji says (roughly at 1:45:00 mark); "what kind of model are they using?"
I really think that the picture is just there to make the connexion between the two, as they say "Never without the helmets but it's a keynot so we can take it off".