Fan Casting Ganthet in Green Lantern Corps DCEU (2017)

With more than a dozen million years of existence, Ganthet is the ONLY Guardian of the original Universe and the only one who survived Sinestro's attack that killed all his former Guardian companions so he is the only one alive. He was one of those who idealized the creation of the Green Lantern Corps, because it was he who suggested that beings with willpower and emotions under control patroll the space