Heroes Come From Odd Places

In the modern kingdom of Sheolan, the prince is known for being a sadistic tyrant, favoring those of higher status and hating those with magic. When those with powers start using them for good, he is forced to wage war on them from behind the scenes, playing along with the figures who grew so beloved.
Who are these heroes?
Wally West, the prince's own most valuable slave, a speedster sold to him by the man's own father.
Bruce Wayne, a wealthy noble whose land is known to bear the most fruit, and where citizens are the most free.
Diana Prince, who comes from the neighboring kingdom of Themyrscira to protest slavery, only to find her calling in heroism.
Shayera Hol, priestess to the Hawk Goddess.
John Stewart, a noble knight of the Green Lanterns, a militia group the prince sees as a threat to their powers.
J'onn J'onnz, a mysterious shapeshifter who seems almost alien in origin.
Clark Kent, a simple farmer with a heart of gold and a body of steel.
Prince Regnai finds the harder he fights the heroes, the more popular they become.