Medusa went down to Amnesty Bay looking for a soul to steal...Who is this so-called "Aquaman" and what are Medusa's plans for him?

Before Dipper and Mabel spent the summer with their Grunkle Stan, Medusa came to town, and it wasn't for the scenery

Black Adam leads an attack on the Ghost Zone. When no one can stop him, only Danny and Billy can take him down