There's nothing anyone can do about it now anyway. This is getting blown out of proportion. I see people on facebook crying and spamming the comments section.
1. wait and see. It could just be a mistake and they had the MoS head lying around
2. nothing any of the customers or Sideshow can do about it, so stop bugging them
3. if this figure does sport a repainted MoS head, there's nothing Hot Toys can do about it at this point. They're already produced and made, sitting in their shipping cartons ready to be shipped out to customers all over the world.
Whatever it ends up being, it's already done. Hot Toys can't just "take it back".
I highly doubt they'd do something like this, I mean, the backlash would be huge. I'm sure it was just a mistake for the display and backstage "coming soon" pic. However, if they did change it last second and it's indeed the MoS head, may God have mercy on their souls. The tears, chaos and insanity that would ensue afterwards would be quite the experience. Seeing that kind of response
might make this whole MoS head worth it.