New head for Reveal the Shield G2 Optimus Prime recolour

TransformerToys.co.uk has been updated with a new news story called New head for Reveal the Shield G2 Optimus Prime recolour.

­The Allspark has posted an image of the instructions for Transformers Reveal the Shield G2 Optimus Prime which shows off the alternative head which will be used on the recolour.  whilst most fans expected a Scourge (RID Scourge, Car Robots Black Convoy) or Ultra Magnus (e-Hobby Exclusive Ultra Magnus), the head sculpt is a complete new one.

More than likely to feature as a Decepticon, will this be Sourge with a new head, Motormaster or some other figure?