Okay so we all know that when Optimus turns evil, he seems to have mysterious red paint on the side of his face. In other promotion images, even Megatron was featured with the red paint on the side of his face and purple optics. Just like many others, my thoughts instantly went to Dark Energon due to the purple optics. But I was constantly puzzled about the red paint, wondering why it was on Optimus when he was corrupted and may even corrupt Megatron as well. Then within an instant, a thought struck me when I recalled another red substance. What if the red paint we see is in fact the movie version of "The Hate Plague?" The Hate Plague was spores that originate from Space and once exposed to a living being made them go mad and try to kill whatever was in their sights. This matches up with what we witnessed of Optimus during the trailer. Only side effects missing are that the infected can spread the plague through touch and I doubt would be defeated by pure wisdom. I think this does make sense that the Quintessons infect Optimus with this plague to make him do what he was built to do. This can explain why even Megatron gets infected if the promotional images are anything to go by. So what do you guys think, do you think this is the movie version of the hate plague or is it really just Dark Energon?