Black Adam

One of the most outstanding magicians in the world, Black Adam was both a hero, and the villain throughout thousand-year life. At the time of Adam Kandak was the oppressing nation which used magic for enslavement of people in the country. But as soon as he became Champion, Adam wanted to make the people free and to operate it as the king. At first he was considered the hero, but after murder of his family, Adam addressed in darkness and inadvertently released the evil spirits known as Seven mortal sins. Then he was imprisoned for crimes, and Black Adam will return from there in 5000 years, having decided to return Kandaka his former glory. 

They say that because of the death of the wizard Shazam, Black Adam could escape from prison. Then, it after all will restore the kingdom. The frequent enemy of heroes of Earth, considers himself the suitable person to head mankind, and any its actions are necessary for general welfare. It can force JSA to oppose it that will lead to a war between Adam and superheroes. Considering, as usual, these stories probably develop there will be more serious threat, having forced heroes to unite to save the world.