Did the Kryptonian scout ship we saw in Man of Steel have a relation with the history lesson we had in Justice League? That is, we know that a Kryptonian scout ship was on earth 18,000 years ago, and we know that each tribe who fought against the forces of Steppenwolf was a representation of a member of the Justice League, the Amazonians with Wonder Woman, the Atlanteans with Aquaman, Yalan Gur with Kilowog and Tomar-Re, and the tribe of men with Cyborg or Batman. Was the Kryptonian who emerged from the ship's pod also a participant in this battle?
Most fans expected Kara/ Supergirl, but Zack hinted in 2018 and again at last month's Man of Steel watch party that he had something else in mind, winking. The invasion he filmed for the prologue of Justice League shows no obvious signs of a male Kryptonian, but it would be easy to hide a female Kryptonian there, specifically among all the super-Amazonians. So perhaps Karsta Wor-Ul is who he intended the pod "escapee" to be, and she had been "adopted" by them.