After the events of Justice League: War, Ocean Master and Black Manta have declared a war against the surface in retaliation of the aftermath of Apokoliptian-tyrant Darkseid's planetary invasion. Queen Atlanna seeks out her other son, Ocean Master’s half-brother Arthur … Sean Astin, Rosario Dawson, Nathan Fillion, Christopher Gorham, Matt Lanter, Sumalee Montano, Jerry O'Connell Added on HBO 2022-06-07. Youtube Trailer