SyFy has slated its Superman prequel series Krypton for a March 2018 release. An exact date has yet to be revealed, so it's not entirely clear when the series will drop in the month.
The news, which hails from KryptonSite, came with a new synopsis that teases Seg-El's sacrifice: either save his home or help restore the fate of his future grandson Kal-El.
According to the series description,
Set two generations before the destruction of Superman’s home planet, KRYPTON follows Seg-El (Cameron Cuffe), the legendary Man of Steel’s grandfather — whose House of El was ostracized and shamed. With Krypton’s leadership in disarray, Seg-El encounters Earthly time-traveler Adam Strange (Shaun Sipos) who warns he’s under the clock to save his beloved world from chaos. Fighting to redeem his family’s honor and protect the ones he loves, Seg is also faced with a life and death conflict – save his home planet or let it be destroyed in order to restore the fate of his future grandson.
This will be DC Entertainment's second prequel series on television. Fox's Gotham, like Krypton, exists in its own universe outside of the ever-popular Arrowverse on The CW. Krypton hails from Man of Steel and Batman v Superman: Dawn of Justice writer David S. Goyer through his Phantom Four banner. He is producing alongside Cameron Welsh (Ash vs Evil Dead), who will serve as the showrunner on the series.
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Krypton stars Cameron Cuffe, Georgina Campbell, Elliot Cowan, Ann Ogbomo, Rasmus Hardiker, Wallis Day, Aaron Pierre with Ian McElhinney.