Please excuse me if this was already asked / stated somewhere before (can't imagine it hasnt), but gotta ask this. Why is Sentinel in the trailer yellow and in the movie he has a Red color. I can imagine that after reformatting he just obtains this color because of his new vehicle mode, but we never saw this before. What was the reason to give him a yellow color in the trailer? Or do you think he will be red in the movie already from the beginning?