The Flash Season 2: 28 Easter Eggs & References You Might've Missed

12. Justice Society

Much like the CCPD mural on Earth-1 is a nod to the Justice League, the Earth-2 version includes a nod towards a DC Comics superteam.

Their slogan is "A Free & Just Society", which is a reference to the Justice Society of America, an alternative to the Justice League, of which the Flash was an original member.

Indeed, the placement of this reference on Earth-2 makes sense, as the Justice League looks after Earth-1, while the JSA are the protectors of Earth-2.