After all, that’s how the Justice League’s origin played out in the New 52 line of DC comics, and the DCEU has already taken ample inspiration from that particular era of DC lore.
Expect his Batman V Superman cameo to make quite a bit more sense once Justice League finally hits theaters.
It’s also worth mentioning just how vital Vic Stone will be to the overarching narrative of Justice League.
The hero directly derives his powers from a Mother Box, and since the League will face off against forces from Apokolips (the same planet that the Mother Boxes hail from), it stands to reason that Cyborg’s specific technical skills will factor heavily into the resolution of the film’s conflict.