If you look at the pic all the faces are turned away from the camera. Even Groot. They just do that not to spoil the big reveal. Same thing with Captain America teaser.
Plus if they had shown a head sculpt, we would all be critiquing it and dissecting it. We'd all decide that it wasn't a good likeness and we should start emailing them right now
They don't want that, the whole point is to hype up the reveal. They won't show anything major until they're ready.
I bet some of you are already thinking Rockets sculpt is a little off. You're thinking it.
