Black Adam is also officially revealed through this trailer, along with his super move which is possibly my favourite so far. Black Adam's allegiances aren't revealed during the trailer, but since he was part of Superman's Regime in the previous game we can safely assume that he's on the side of evil. The trailer may also be implying some sort of rivalry between Supergirl and Black Adam that might be significant to the story as a whole.
Only three slots remain on the roster for the game's May 16th release. Scarecrow, who is part of the mobile game, and Captain Cold, who we caught a brief glimpse of in the last trailer are practically confirmed, with their official, main game reveals pending. The last spot on the roster of twenty-eight is rumored to be going to the Joker, who we have yet to see in any way, shape or form.