That’s right. This is the art work of talented illustrator Fabian Gonzales. Each flag shows a characteristic of the particular superhero.
The awesome part is that he sells them as prints on white 100% cotton t-shirts; and they are printed with advanced digital dry ink method to ensure vibrant image quality, so this is not bad quality at all. You don’t have to be a superhero expert to spot the Batman and Superman flag.
Speaking of Batman, here is the new Angry Bird edition with angry batbirds, enjoy!