Aquaman was the butt of every superhero joke for years. Mocked as the guy with the power to talk to fish, the idea of an Aquaman movie was seen as a one-way ticket to a huge flop. Then James Wan and Jason Momoa came along and singlehandedly made the character cool. Momoa's take on Arthur Curry was near-universally praised and he can take credit for a decent slice of Aquaman's $1.1 billion box office haul. But it seems that Warner Bros. is already looking for a replacement for him.