Yeah. I don't think we've seen him at all in the New 52 yet. He was Johns creation too I believe. Black Manta's son correct? I've already forgotten his name.
Jackson Hyde/Kaldur'ahm. yeah, Johns created him and he is Black Manta's son just like in Young Justice. i remember reading somewhere that Scott Lobdell wanted to use him in Teen Titans and was denied. hopefully he'll show up soon.