If he’s anything like his comic book counterpart, Yahya Abdul-Mateen II’s Black Manta could come dangerously close to killing Aquaman.
James Wan also clarified that while Black Manta does play an important role in Aquaman, he’s not the main antagonist.
Nevertheless, between being a ruthless pirate and wearing a suit that allows him to shoot plasma beams out of his eyes, Black Manta is not to be underestimated.
That honor belongs to Patrick Wilson’s Orm, with the main story focused on Orm’s adversarial relationship with Arthur Curry, his half-brother.