The image is meant to focus on the long tailed, blacked out filly in the foreground of the season 5 character poster and try to figure out whether she’s wearing a crown. Look closely at the blacked out area on her head, and you notice a distinct outward curve on the left and, on the right, a definite gap between Twinkleshine’s eye and the blacked out area meaning they aren’t connected, lending credence to the idea that she’s wearing a crown.
You decide if I’m reading too much into this or am on to something.