That makes sense. She could be a surviving colonist still in stasis on some overlooked scout ship on another planet, which could have been named Argo/Argos by the Kryptonian settlers.
I feel like WB has missed their opportunity to adapt the Reign of the Supermen storyline and are skipping it in favor of having Superman resurrected while the Justice League is dealing with an Apokoliptan invasion. It bugs me that whenever there's an adaptation of the Death of Superman story, they always leave out the Reign portion, or it's very simplified, as in Superman: Doomsday. There might need to be some changes for it to work as a movie, but it would be intriguing to see the debuts of Superboy, Steel, the Eradicator and Cyborg Superman. Introducing Superboy would be easy since it's feasible that the government would want to clone Superman and have him under their control in case of any future alien threats or another Doomsday scenario. Then John Henry Irons/Steel comes in wearing powered armor that he reverse engineered from Kryptonian tech. Eradicator could be the Jor-El AI creating a physical body for himself so that he can find and revive his "son"(picture Russel Crowe in a version of the Superman suit with that visor), while Cyborg Superman could be tied into Cyborg's origin and act as a rival for the character.
