8 Iconic Superman Villains Yet To Appear On Film
2. Mongul
As the tyrannical ruler of a brutal alien world and the destroyer of Coast City, Mongul's CV is almost as impressive as Darkseid's.
When he attempted to turn Earth into his own personal galactic gladiatorial arena, it took a band of heroes led by Superman to take him down.
Green Lantern can probably claim more of a beef with Mongul than Supes since Coast City was his home and its obliteration led to the downfall of Hal Jordan.
In keeping with this, after the original Mongul was killed by the demon Neron, his son Mongul II became a major player in the Sinestro Corps.
Perhaps we're more likely to see the villain crop up in a future Green Lantern Corps movie than a Superman film, but he'd also be a solid choice for the role of antagonist in a Justice League sequel, once Darkseid has been dealt with.