In DC’s upcoming 2021 event Future State, Superman will be rejected by Earth and fight as a gladiator on Warworld, which sounds similar to certain events in Marvel's Planet Hulk.
Future State will debut in January 2021 and shake up the entire DC Universe over the course of two months with a premise that temporarily looks into the various DC characters' near future. While the Justice League deals with the consequences of Superman's recent identity reveal and Gotham City is under siege by the Magistrate, Earth turns its back on Clark Kent during an international crisis.
According to a press release from DC detailing what fans can expect in Future State, Clark is rejected by his adoptive home planet that had previously learned Superman's secret identity. Without a world to fight for, Clark travels in search for one that might benefit from his abilities. Soon, the Last Son of Krypton makes his way to Warworld, where he encounters Mongul, a tyrant war lord who oversees brutal gladiatorial matches between various alien species. Superman has no choice but to join in Mongul’s games in order to eventually go up against him, partnering alongside a few unlikely heroes.
Meanwhile, in Superman's former city of Metropolis, Jonathan Kent is taking up his father's mantel and aspires to become the new Superman. Upon witnessing total catastrophe in Gotham, he decides to bottle Metropolis so that he can preserve it from potential calamity. However, Supergirl doesn’t see eye-to-eye with her cousin’s successor and disagrees with his decision.
Superman's new story arc echoes Marvel’s Planet Hulk, which followed Bruce Banner's green giant alter ego upon being banished from Earth for being deemed too dangerous. After his ship crash-lands on the foreign planet Sakaar, Hulk doesn’t have any other option than to obey their emperor, the Red King, and join in gladiatorial combat against alien competitors. Over time, Hulk inevitably becomes a popular gladiator and is seen as a hero by the people of Sakaar. Soon, he enlists the help of other gladiators to fight back against their dictator overlord, the Red King. Aspects of this storyline were loosely adapted for the 2017 MCU film Thor: Ragnarok.
DC has enlisted a wide range of writers and artists to depict the line-wide, universe-shattering events of Future State, which debuts in January 2021. The future adventures of the Man of Steel on Warworld will be chronicled in Superman: Worlds of War, written by Phillip Kennedy Johnson (The Last God, Marvel Zombies: Resurrection) and illustrated by Mikel Janin (Trinity War, Grayson, Batman).
Source: DC Comics