Character A has lived his life unaware that he is the true heir to the throne of Atlantis. Shortly after his birth he was hidden away on the surface world, safe from those seeking to eliminate the royal bloodline and replace it with their own. On the surface world he is a nobody, fading into the background but always feeling the call to something greater. Character B grew up under the ocean's waves, fed on stories of the ills of the Atlantean royal family and how it is by their weakness that Atlantis sunk beneath the waves and has been forced to remain their, victims of the surface world's disregard for the ocean. He was raised to be as deadly as the ocean itself, ruthless and cold. Now the rebel forces have finally claimed the Atlantean throne but the existence of a true heir to the throne keeps the rebels from securing it. Character B is dispatched to hunt Character A down and bring him back to Atlantis to be publicity executed. The problem is, when Character B finally finds Character A he starts to see the king within the man and he begins to doubt everything he's ever known.
(I'll play either. Doesn't have to be Atlantis, can be anything really. A could be a demon prince or a exiled werewolf or a prince from another planet)
Character A is a werewolf alpha, the leader of one of the most powerful packs in America. He has developed a reputation of being savage in his dealings with his enemies and absolute with his subordinates. Fear of the alpha and his most deadly agents keep the other packs and supernaturals living within his territory mostly submissive although every once in a while there is someone that challenges Character A. Character B is an independent werewolf/vampire/sorcerer/whatever living within Character A's territory and while he might not agree with the Alpha's approach, he isn't looking for trouble and does his best to keep his head down. However, rumors have reached Character A's ears that Character B has the potential to be a True Alpha/Master Sorcerer/Vampire Prince/etc, rare pinnicles of each race that will surpass even Character A in power. Curious as to the validity of these claims and desperate to increase his own power, Character A dispatches one of his most trusted agents, Character C to investigate and recruit Character B. Character C isn't a wolf but has a unique power to convince others to do as he says. He works his way into Character B's life and convinces him to meet with Character A, to consider the Alpha's offer to become his second and the third in Character A and C's relationship. It is quite the offer, after all, the only thing Character A is more greedy about than power is who can touch Character C.
(I'd be willing to turn this darker and introduce a criminal element to it. Character A could be a supernatural mafia boss, maybe B is someone in the police force, political arena or some other position that threatens Character A's operation so he sends C to get close and spy, maybe even kidnap him. I'm willing to play C and A unless you want to play A)
I'd kill to play against someone like Kellan Lutz, Chris Hemsworth, Taylor Kinney or especially Jason Momoa (since his casting as Aquaman inspire the first line. Slash and threading please.