As a result of Mister Mind "eating" aspects of this reality, Earth-3 has been revealed to be the mirror image of New Earth. The Crime Society of America are considered to be evil versions of the heroes of New Earth, acting as a counterpart. A hero known as the Jokester operates this universe, as later do the Riddler, Three-Face (Evelyn Dent) and Duela Dent.
The Riddler Family
The Crime Society