The flag has a dark colored background, perhaps black or midnight blue

The flag has a dark colored background, perhaps black or midnight blue. In the center of the flag, Batman is drawn in his iconic suit, with his cape fluttering in the wind. Batman is standing on a rooftop, and in the distance the illuminated football stadium can be seen. The scene can be framed by a silhouette of the urban skyline, with the stadium lights shining brightly and standing out against the night sky.